SCIENTIFIC ABSTRACT STARTSEV, V.I. - STARTSEV, V.YE.

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December 31, 1967
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SCIENTIFIC ABSTRACT
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5-1-- 4 -3-24/30 e of 4r. ~--aesium Iodide ,he Temperature Dependen-.~ Crystals Acti-.----ted b- Thalliu-i. the figuTe on 1~.4.12, where, rhe, yield (I) is plott-e-d aeainst- ((--ontin:,zo-us) --ives the ex-peri-:,~ental and 2 W,ashed) tile C, ret 41, ~~ai -value,- ~-aiculated the eqiation I A/[1+b with b = 3,15": x 1C- and 4.9 x -,0- er-&:3. Near ro(m.-- temperat-ure the decreasie of intensity i-. ab,:;-x'1, 0.,7 '1, p:)'r rlegree. is 1 figu--e and 2 referen~~-Is., SUBT."ITIL~D: j~;!y 1, '1959. !. Caesim isidide w7stals-Lmmines-cenas 2. Thallium (activated)-,Applications 3. Lmwtnescea1~e-Tmjeratu-,* effecta C a 2'4' ( 2 SOV/' i'-55-5-1/56 7', '"ORS: Obrei-lov, I. Startsev, V. I. TITLE: The Formation Work of an Elastic Twin in Calcite (Rabota obrazovaniya uprugo"o dvoynil.a v kalltsite) PERIODICAL: Z"iurnal eksperimentallnoy i teoretlichesko,[ fiziki, 1958, Y,)l 35, Nr 5, pp 1065-1073 (USSR) "'~STRACT: In the introdiiction the calcite crystal, which belon~-s to the triLonal syn-ony, is Aescribed in detail, and exact data 0 conce-ninj the form of its crystallization are --~-iven (Figs 1-3). Thf, process of twin-formation (Fi~,';s 4, 5) invest-..-ated by R. I. Garber (Refs 1, 3-5) is discussed. The next cl,-)a-,ter deals with the exoeritnental arran,-,eraent and with the object of the test. First, the shape of the calcite evi,stals, which were prepared especially for thece ex-periments, is discussed in detail. Pi.iire r, shows a prepared calcite rhombohedron, and fip,-ure 7 a prism. PijureL_~ 7 and 8 sliow a schematical draw- in,,--,- of the experimental arrangement, and figure 10 is a photo- rraph of the elastic twin crystal BB-3- Chapter 3 deals with the shape and the dimensions of tne elastic twin in calcite formed undez, the influence of a concentrated load. Fi~,:ure 11 Card 1/3 slioas a dia-ram of the twin crystal BB-3and figure 12 shows The Fo2mat_'on Work of an Elastic Twin in Calcite 3011/56-35-5-1/56 the dependence of the length and breadth of the twin crystal V, 6R on the load F. The din, ensions of 8B--3 are --riven in table I 1~ - (10 = 1.95 mm, b. = 2.44 mm, ho = 1-95-10 4 cm, F = 2-59"i'g-11. ri.:.,ureo 1/j.-16 ohow the load dependence of the thickness of the twin crystal 8B ;.t.; viell as -1.0c, regults of inveg tit-,at ions of the crys,als Nr (), 7 and 8. I-Finally, the calculation of the work of formation as well as the destruction of the crvstals are discusffe~.'. 'Phe following values were obtained fo~- the viork uerformed for the purpose of producinE 1 cm2 of the surface oIr f an elastic twin ~,rystal: Number of twin work nrmber of twin work erglom2 erg/cm 2 6K 3720 BA 2670 6s 516o 3B 2400 7U 4450 OL 2890 7N 6400 8p 2400 Vard 2/3 The Form at. ion W.,rk of an 7-1 a st. ic ~2-, .;-& in n a I c4 ~e Scv/ 'Phe linear limensions of the tv;in are proportional to the load, ce Js proportional to the work ,in, t, e area of 'the twin surfinL U J I - ,,~e 1-f ormo - t~ jtoii. There are V7 fil- 2 tables, d ,1y ~jje Iq pi. -ures, :inrll 11 references, 10 of villich are '13oviet. TiOC YAT r ON Kharlkovokiy inotitut khozyaystva Khar1kov Institute for the Mechanization of Agriculture) ',f..oskovskiy inzienerno-fizicheskiy institut ('.'oscow EnL-ineerinZ,-P.,iYsical Institute) 5UDMITTED June 7, 1953 Card 3/3 AUTAO RS, Startsev', V.I. and Aronova', P,N. SOV70-4-1-15/26 TITLE,- The Determinati-on of Micro-distortions in the Slip Bands in Rock Salt (Opredeleniye mikroiskazheniy v polose skol'zheniya kamennoy soli) PERIODICAL- Kristallografiya, 1959, Vol 4, Nr 1. pp 85 - 89 (USSR) ABSTRACT: X-ray diffraczion studies have been made of the resions of the crystal lat'Gice adjacent to the slip hand in a deformed crystal of rock salt, The Debye temperature of this region has been measured and appears to be only half that of -the undeformed crystal, The static displacements of atoms in the slip band and far from it have been measured. Rods of NaCl 0.8 x 0.8 mm in cross-section, were examined at room temperature and at liquid-oxygen temperature by rotation photograph. The films were photo- metered to give the 200 9400 and 600 integrated intensities. The formula: I'o 12h2 sin2# log Yhk1 = log q)((),Tl7T 2) 0 %Jardl/3 was used; 1?1/78-1-1_B-&S261n Rock The Determination of Micro-distortions in h~, 11P Salt II /Inh, YhkI ~ hki ,, is the ratio of the integrated intensities at room temperature and liquid-air temperature, a is the Debye temperature and q) the difference in the Debye function-,. The Debye temperature for the pdefor~ed material was found (from ? specimens) to be 281 K * 7 . A larger crystal 10 x 10 x 6 mm was deformed by compression by a load of qOO g/mm 2 and a rod containing the deformed part was sawn out. The slip plane was parallel to the axis of rotation The Debye temperature was here found (3 ,10. -Dlacements 5 of to be 160 K + 9 The mean static dis- the atoms were calcul'ited from: 2s1-4 The r.m.s. value The question as was localised in Card2/3 'he crystal were 0 of il was found to be 0.18 + 0.02 A J~o whether all the plastic deformation the slip band or whether atoms throughout statically displaced was studied by SOV/-O -4-1-15/2~ The Determination of Micro-distortions in the 61-Lp Bands in Rock Salt examining the crystal far from the slip band. The crystal was found to be appreciably less distorted away from the band but displacement of the atoms was still marked. Acknowledgment is made to Academician I.V, Obreimov for his advice, There are 2 figures, 4 tables and 8 Soviet references. ASSOCIATION; Kha:L-kovskiy filial Instituta reaktivov (Kharlkov Bran(,,h of ~he Institute of Reagents) SUBMITTED: June 2, 19 58 Card 3/3 AUTHORS: Startsev, V.I. and Aronova, P.N.SOV/70-4-3-31/32 TITLE- -Tri-e-Influence of Annealing on the Stvueture of the Crystal Lattice in a Slipband of Rock Salt PERIODICAL: Kristallograftya, 1959, Vol 4, Nr 3, pp 438-440 (USSR) ABSTRACT: Measurement of Laue photographs showed that in the.slip- bands of deforiued crystal of NaCl the crystal latticeis in an unotable state. Annealing at. a temperature near to the rielting. point fully re-establishes the lattice and the interatomic bondinG- This is shoi-m by the observation that after annealing the characteristic Debye temperature returns to its proper value. At 600 OC the re-establish- ment of0the lattuice be.-ins to proceed intensively and at 400 C there is practically no change. This is surprising as sti-ldies of the phenomenon in specimens of pure t-,ietals sho-ured no changes In Debye temperatu-re. A graph is given of the neasured Debye temperature and the mean static displace.-.,.ent of the atoms against annealing temperaturo. The normal undeformed Debye temperature is 280 OK and -w-hen the crystal is deformed by a load of SOV/70-4-3-31/32 T'Ii-c Influericc of Annealing on the Structlire of -the Crystal Lattice in a Slipband of Roolz Salt 500g/m, 2 this falls to 150- 70 0K. The r.m.s. atomic displ.acement is about 0.18 k. Iuvestigations were also made of the scattering background between spots in the Laue photograph which was present only in the deformed state. Full return to the normal state of the crystal required about 10 hours at 760 OC. There are 1 table, _9 figures and 4 Soviet references. ASSOCIATION: Khaz-1.1-covskly f1li-al IRYeJiL SUBMITTED: September 2. 1958 Card 2/2 24'(2) - AUTHORS: Aronova, P. N., Startsev, V. 1. SOV/48-23-5-14/31 TITLE: Determination of the Static Displacements of Atoms in the Slipping Band of Rock Salt (Opredeleniye staticheskikh smeshcheniy atomov v polose skoltzhaniya kamennoy soli) PERIODICAL: Izvestiya kkademii nauk SSSR. Seriya fizicheskaya, 1959, Vol 23, Nr 5, pp 606-6io (USSn) ABSTRACT: Pirst, reference is made to the method developed by G. V. Kurdyumov and his collaborators for the determination of the static displacement of the atoms in the deformation of metals. It was found that when subjecting metals to cold-treat- ment their Debye temperature does'not change. As ras shown by N. A. Brilliantov and N. A. Obreimov, a large number of slip planes is generated on the deformation of parallelepiped rock salt crystals; these planes are visible in the polarization microscope. The determination of the Debye temperature of non- deformed crystals is then dealt with, and the values obtained are tabulated. Sample measurements are given in connection with the Debye temperature in the slipping bands. A micropicture of Card 1/2 such a slipping band uith a pola-rization microscope is then -Detex~mination of the Static Displacements of Atoms SOV/48-23-5-14/31 in the Slipping Band of Rock Salt shown, and the values measured on some samples are also specified. Next, mention is made of the relationship between the mean displacement square and the Debye function, and the computed values of the root mean displacement squares of the atoms are specified. The static deformation is dealt with next. Measuring values of atom displacement in the slipping band and pertinent values of Debye temperature are tabulated. Results show that plastic deformations are not restricted only to the slipping bands, but that also atoms lying at a considerable distance are affected by them. This unstable atomic state may undergo recrystallization with an appropriate thermal treatment. This is likewise investigated and results are sumnarized in a table. There are 3 figures, I table, and 6 Soviet references. ASSOCIATION: Kharlkovskiy filial Instituta khimicheskikh reaktivov (Khartkov Branch of the Institute of Chemical Reagents) Card 2/2 PHASE I BOOK EXPLOITATION SCV/5053 V9**QYuz-nAya konrerentalya po trenlyu I lznoau v maahlnakh. 3d, 1958. 1zno8 I iznosostoykostl. Antifrlktalonnyye materialy (Wear and Wear Resistance. Antitriction Materials) Moscow, Izd-vo AN SSSR, 1960. 2T3 P. Errata slip inserted. 3,500 copies printed. (Serleat Its; Trudy, v. 1) Sponsoring Agency: Akadomlya nauk SSSA. Institut ma3hinovedonlyn. Reap. Rd.-. K. M. Khrushchov, Proressar; Zd3. or Publishing Nouse: P. Ya. Klebanov, and S. L. Orpik; Tech. Ed. T. V. Polyakova. PURPMEs This collection of articles In Intended for practicing engineers and research scientists. COVERAGE: The col2ectlcr~ published by the InstItut "a ShIn-vedenlya, AM SSSR (Institute of Science of Machines, Academy of Sciences USSR) contains papers presented at the III Vaejsoyuznaya Kon- forentslya Do tranlyu 1. Iznosu v mashinakh (Third All-Union Co~tsrvncs on Friction and Wear in Machines) which Nab bold A r~l 9-15, 1958. Proble=s discussed were In 5 main areas. 11 lydrodyrAmic Theory of Lubrication and Friction Bearings (Chairman; Ye. M. Out Iyar, Doctor of Technical S C IenceZ,.and A. K. D-yachkov, Doctor of Technical Sciences), 2) Lubr tion and LubrIvAnt Materials (Chairman: U. V. VInogradov, Doctor of Chemical Sciences); 3) Dry and Boundary Friction (Chairmen. B. V. Deryagin, Corresponding Mamber or the Academy of Sciences USSR, and 1. V. Kragel Inkly, Doctor of Technical Sciences); 4) Wear and WearoRlsistance (Chairman: 9. M. Krushchov, Doctor or Tachni a 5 ionces); and 5) Friction and Antirric- tion Materials (Chairman: I. V. Lragel Isicil, Doctor or Tech- nLc clances, and P. M. Krushchov, Doctor of Technical 3 n a ). Chairman or the general assembly (on the first and last day of the confarence) was Academician A. A. Blagonravoy. I. Yu. Pruxhanakly, Candidate of Technical Sciences, was acl- entific secretary. The transactions of the conference were published In 3 volumeno of which the present vol=e to the first. This volume contains articles concerning the wear and me" rVsIst&nc0 of antifrlction materials. Among the topics covered are; modern developments In the theory and experl- mental science or wear- resistance of materials, specific data on the wear resistance of various combination$ or materials, methods ror increasing the wear resistance or certain materials, the effects of rriction and Near on the structure of materials, the mechanism of the seizing of metals, the efrect or various types or lubricating LAzerlala on salzing, abrasive wear of a wide warletr of materials and compontaits under many different conditions, modern de'valopmenta In antifriction materials, and the effects of finish machining on wear resistance. Many per- lonalItles ard mentioned In the text. References accompany most Owrb M. L X-Ray Investigation Of the Structure of 00 e armed by Nonuniform Volumatrie compression at 120 mormal and Elevated Temperatures lea V. Ta., and I Si on the Stresses UP * ra Trans forRrTrMW-Ih__3_t* .d 11MkIS-~. ! &I Due to Wear nd '; & ova P. Gripping of Metals Under Ordinary Can- dF1qtkron1. ~&Jns- r~- Action of Normal Loads P 1. TopekhA, and 1 0 XO5OvskIY- -ff-an Surfac;s a on *fc and the Wear -Secondary Structure or Metals D's. yookabo Ikov, s"I DY-i-al , In 0 f and jS_1,_MTuLr_0_Y&VLX~ Ins, :522 - ~~-N-1-U.N.IrgAtions In the'Cass of Wear Card 7/13 136 144 152 263 GORDOY, A.N.; KIRMOV, I.I.; LAPINA, N.A.; XRGARDT, R.N.; aART5EV, V.I., red.; K=WSOVA, M.I., red.izd-va; MATVEYEVA. A.~e-.T-te-kh-n.-ra--E.- [Measuring high temperatures] Hetody izmerenila vysoldkh teaperatur. Moskva. Gos.izd-vo standartov. 1960. 52 P. (Seriia obzornykh mono- grafii po izmeritellnoi tokhnike. no.12). (MIRA 13:12) (Pyrometry) STARTWa. V.I,p otv. red.; ALEKSANDROV, B.S., red.; BELYAYEV, L.M., red.; IRUDZI, V.G., red.; VOYTOVETSKIY, V.K., red.-- w GALANIN, N.D., red.; DISTANOV, B.G., red.; KLINOV, A.P.p red.; ~A-~;~NKO, M.G., red.; SH&OVSKIY, L.M., red. [Scintil-lators and scintillation materials) Stsintilliatory i stsintilliatsionnye materialy. Moskva, Gos. komitet Soveta Ministrov SSSR po khimii, 1960. 319 p. (MIRA 15:4) 1. Koordinatsionnoys soveshebaniye stsintilliatoram. 2nd, 1957. (Scintillation counterer S/123/61/000/012/012/042 AOOVA101 AUTHORS: Iokheles, F. Ya.; Startsev, V. I. TITLE: Investigating the microstructure, stresses and wear of 18 (18KhNVA) grade steel subjected to three different heat-treatment conditions PERIODICAL: Referativnyy zhurnal, Mashinostroyeniye, no, 12, 1961, 81, abstract 12B576 (V sb. "Povysheniye iznosostoykosti i sroka sluzhby mashin. v. 1" Kiyev, AN UkrSSR, 1960, 242-249) T EXT The authors investigated the resistance to wear of 18KhNVA grade steel utilized for heavily loaded gears after bending subjected to heat treatment used at the plant (cementation, double tempering at 6500C with 6 hours 30 min, holding, oil-hardening from 8500C, tempering at 140-1600C for 2 hours)- high- temperature hardening (heating after cementation in a salt bath at 985 6C, 10 min holding, tempering at 140-160 C), and step-by-step hardening (after cementation and high tempering the parts were heated to 810 + 10 0C, 25 minutes holding, trans- ferred to an oil bath with a temperature of 160j7O OC, 5 min holding and cooling in air; tempering at 1500C). For the manufacture of gears the authors recommend Card 1/2 S/123/61/0oo/012/012/042 Investigating the microstructure ... A004^101 to use step-by-step hardening which reduces deformations and inner stresses and increases the resistance to wear. There are 8 figures and 10 references. N. Il'ina [Abstracter's note: Complete translation] Card 2/2 GIWGUZIN, Yh.Ye.;~,-STA-qTSZV,-V-.-j_,; BURAVLEVA, M.G.; I-ADIKYAN, R.A.; ILMUT. T.P.; SHPW4T, A.A. Cloudiness (~"agiheg) of pellets pressed from ionic crystal powders. Kristallograftia 5 no.2:295-302 Mr-Ap 160. (MIRA 13:9) 1. Kharkovskiy f lial W6810yu2nogo -nauchno-Issledovatel'skogo instituta khimicheskikh reaktivov. (Salt) (Potassium chloride) BINGUS, V.Z.; IAVRMITYEV, F.F.; 16 Exposure of dislocations in calckle crystals. Kristallografiia 5 no-3:441-445 14y-Je '60. (MI" 13: 8) 1. Kharkovskiy filial Ysesovuznogo natichao-iseledovatel'skogo instituta khimicheskikh-reaktivov. - (Calcite crystals) - ;4 f S/07o/6o/oO5/O3/oo6/oo8 EA32/EA6 AUTHORS: Lavrentlyev, F.F Soyfer, L-1, n Rtartsev, V.I. TITLE: Thermal Etching and Annealing of Twinned Layers in Crystals of Antimony V~l PERIODICAL: Kristallografiya, 1960, Vol. 5, No. 3, pp.472-475 TEXT: The study of twinned layers with dimensions 5 to 20 ji in single crystals of antimony has shown that annealing at 600 C (for less than 5 hours) leads to the establishment of mono- crystallinity in the specimen. The twin boundaries and the glide steps are the place -s-ihere the most intense thermal etching occurs. Edge dislocations have been discovered both in the parent crystal and in the twinned part. The dislocation lines lie in the 111 plane. The 111 planes in antimony are the directions of the principal cleavage. The crystals of antimony were obtained, after preliminary zone refining, by the Shubnlkov-Obreimov method. Specimens utere in the form of plates 2-3 mm thick and 10-12 mm in diameter. They were prepared by cleaving the crystal which had been grown. The defdrmation produced in this process gave rise to the tivinned layers mentioned, The examination was carried out Card 1/2 S/07o/60/005/o3/oo6/oo8 �1~2~E~60,, Thermal Etching and Annealing of Twinne a e s Crystal, of Antimony witli a MINI-7 metallurgical microscope using oblique illumination and by the divorgont-boam X-ray technique (reflexions from 111 and 001 planes being used)'.- Az)noaling at 600 0 was carriod out in a current of hydrogen. Intense thermal etching accompanied the annealing process. A special high-temperature camera was used to follow the course of the etching under these conditions. There are 5 figures and 11 references: 8 Soviet and 3 English. ASSOCIATION- Kharlkovskiy institut mekhanlzatsli i elektr�flkatsli sellskogo khozyaystva( Khar~kov Institute for the SUBMITTED, Mechanisation and Electrification of Alzririlltnre) September 18, 1959 Card 2/2 -3/0 70/60100 5100 5/019/026/xi B132/Ei6o AUTHORS: Starts Bengus, V.7., Lavrentlyev, , L~M. TITLE: The Formation of Dislocations in the TwiLi~ng~o'f Calcite PERI6DICAL: Kristallografiya, 1960, Vol.5, No.59 PP.737-71+3 TEXT: It is found that in calcite a twin boundary not containing dislocations is made visible by selective etching although the intensity of etching is significantly less than the intensity of etching at dislocations. The existence of incoherent twin boundaries containing dislocations has been experimentally shown. In the crystal In the twinning process complete dislocations are formed. The twins were produced by Garber's method (Ref.5). Twin layers were studied on the face of the crystal not forming steps on twinning, i.e. 100 or 010. The twin plane could be indexed as 110 with the boundaries of the twinned layers parallel to rpofl. There are 1+ figures and i2 references: 11 Soviet and 1 English. ASSOCIATION: Vsesoyuznyy institut khimicheskikh reaktivov, Kharlkovskiy filial (All-Union Institute for Chemical Tf, - -1 1'. Rrar. T,71 ) ___ P! P n '7'PD- 7,7-- 1~1 1060 S/051/60/008/04/018/032 3201/2691 AUTHORS: Tsirlin, Yu. A. Startsev. V.I. and Soyf r, L.M. TITLE: Luminescent Proporties-ror Cassius Iodidf~lrystals Groin from Superheated Melt PERIODIGALz Optika i speirtrookopiya, 1960, Vol 8, Nr 4, pp 537-5W (USSR) ABSTRACT- Knoopfel, Loopfo, Stoll at al.,(Refs 1-3) reported that Gsl crystals grown from superheated (to 800-9000G),melts exhibit luminescence and have an d.-yield of 9.3%. The present authors repeated Knoopfal, V/Z Loopfe, Stoll at al's work using analytically pure (Series 1). zone-refinod (Series 2) and very pure (Series 3) GsI crystals. Crystals of Series 1 and 2 were found to contain 2.3 x 10-4-2.7 x 10-5;r. Tl; their absorption spectra (Fig 1) had a Tl band at 299 mp. Seriso 3 crystals were subjected to chromatographic purification and quadruple re-crys tall I zation; this treatment reduced the amount of Tl in Chem to below 10-7% (Fig 2) and no scintillations were observed on "citation 'with K-ray*. Samples of each series were placed in carefully cleaned quartz ampules , which were evacuated, sealed and heated for up to 5 hours at 9OOkG. After such heating temperature Card 1/2 of the malt was reduced and no v crystals were grown at the rate S/0,51/60/008/04/018/0.32 3201/Z691 Luminescent Properties of Caasium Iodide Crystals Grown from Superheated Melt of 3-5 um/hour. The relative y-aciatillation yields of crystals ol' each series are sham in Fig 3. Series 1 yields rose with the dumtion of superheating to about 60% (after 5 hours heating). while those of Series 2 and 3 rose to over 10/. after 1-2 hours and an further super- heating fell to below 10/QL The results obtained show clearly that luminescence produced by superheating cannot be due to thallium impurities, but it is probably caused by dissolution of quartz itkpuritioa and consequent activation of CsI with silicon; the hypothesis of Knoopfel, Loopfe, Stoll at al. that this luminagconce is due to iodine vacancies was rejected by the authors - Acknowl ed Vn ants are made to R.S. Budnik and L.G. Maystrenko for help in growing of crystals and measurements on them,and to A.N~ Fanova for obtaining the absorption spectra. There are 4 figures and 9 references, 4 of whidh are Soviet, 4 Swiss ar4 1 Italian. SUEMITTED.- July 13, 1959 Card 2/2 69275 S/0151/60/008/0 4,/O1 9/0 3 2 1201/9691 AUTHORS-. Startsev, V.I., Baturichava, Z. . and Tairlin, Yu.A. TITLI: The Temperature Dependence of Luminescence of N&I(Tl) Crystals at Temperatures of 0-27000. -, 1 11 MIODIGAL: Optika I spektroskoplya, 1960. Vol 8, Nr 4, pp 541-544 (USSR) ABSTRACT; The reported (Refa 1-4) tomperaturo d6pandances of the intansity of luminescence of Nal(TI) are contradictory. The aim of tho present work was to study the temperature dependence of the intensity of luminescence of NaI(Tl) with 0.05-0 .1% Tl excited with Ii-rays. The temperature dependence was obtained between 0 and 270'OG at the rates of heating varying frcm 15 to 90 do&/hour. An N&I(Tl) crystal of 13 mm diameter and height (4 in Fig 1) was placed in an aluminium container 6 inside a copper block 3 which was joined by means of a copper rcid with a heater. Tonperatures were measured with a copper- constantan thermocouple and the temperature difference between the surface and the contra of the crystal did not exceed 20G. A photo- multiplier 9 (FRU-19) was separated from the crystal by a plane-parallel glass plate 7 and it was air cooled. The crystal was excited -with Y-rays Ca rd 1/3 from 05137 (1~ = 661 keV). Dependence of the anode current of tho 69275 8/051/60/008/0 4/6 19/0 32 3201/3691 The Temperature Dependence of Luminescence of Nal(Tl) Crystals at Tsaperatur,:~s of 0-2701DC photomultiplior on the crystal temperature (integral measurements) -mav obtained by means of a micreammeter M-91a. across which a 10 jiF capacitance was connected (this ensured that x = RC of the system was 4 s6c). Alternately a pre-amplifier was connected to the photomultiplier anode and pulses from Its output were fed to an oscillograph 251 and photographed (pulse measuremente). The decay time mas deduced from the form of the dependence of the pulse amplitude on the absolute temperature T and on x. After several heating-cooling cycles (Fig 2, curves 1 and 2) the intensity of luminescence was found to decrease linearly with rise of temperature at the rate of 0.12 t 0.03 ldyldeg (Fig 2, curve 3). Luminescent properties of the crystals were not affected by the amount of thallium between 0.05 and 0.1%. At roam temperature the main component of luminescence, amounting to 90-95/o of the total sigml, had a decay time T'l = 0.25 usec; the remaining 5-10% of luminescence had a d ecay time -t 2 = 0. 't -1. 2 lis ec. Dependence of the decay time -'~.l ou temperature is shown in Fig 5. Theoretical dependences of th!jhoto- multiplier signal V on the absolute temperature T and on x = RC.Mculated Card 2/3 using x(T) and VoM, vhers V. = lim V Es RG 4 0. The theoretical 69275 a/051/6()/008/04/019/032 9201/9691 The Temperature Dependence of Luminescence of NaI(Tl) Crystals at Touperatures of 0-2700C curves agreed satisfactorily vith the authors, experimental results OK (Ref 3) and with the-data of Webb and Johanson (Ref 2) and Kinard (Ref 3), but they differed from the results reported by Solon at al, (Ref 1) and by Meessen (Ref 4). There are 5 figures and 7 references, 1 of -which is Soviet, 5 English and 1 French. SUEMITTED: July 17, 1959 Gard 3/3 S/020/60/134/004/006/023 B019/BO67 AUTHORSt Soyfer, L. M.. and Startsev...V. TITLE; Some Phenomena Which Were Observed During the Deformation of ~.f Monocrystals-,,l ~ntimqp PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol, 134, No. 4, pp,~ 795 - 796 TEXT: The authors investigated the twinning process of antimony mono- crystals caused by mechanical deformations by studying selective corrosion which allows dislocations to be determined. The samples (thin disks, 2 - 3 mm thick, diameter; 10 - 15 mm) were cut out from the mono crystal in the direction of the (111) cleavage traces, the caustic solution was composed of 9 unit volumes of concentrated nitric acid and 4 unit volumes of distilled water. As appears from Figs. 1 and 2 a d-is-twinning leads to an incomplete regeneration of the crystal lattice and causes lattice defects. These defects in turn cause a hardening of the crystal, The experiments also showed that the dislocations may form at any point of the twinning layers. As is shown by theoretical Card 112 Some Phenomena Which Were Observed During S/020/60/134/004/006/023 the Deformation of Antimony Monocrystals BO19/BO67 considerations and by experiments (Refs. 3, 4) elastic twinning does not lead to disorientation of these two blocks if the angle between the two blocks is not more than 2 - 31. During the study of selective corrosion it was observed that this angle is smaller than 1/2'. Finally, it is demonstrated that dislocations occur in high-purity antimony monocrystals on bending the crystals also by a gliding of the crystallographic planest This is in contrast with the assertions made earlier (Ref. 7). R.I.Garber and V,. M., Kosevich are mentioned. The authors thank V. G. B2pEus and F~, F, Lavr;zntfyev for the discussion of the results. !f-here are 4 figures and 7 Soviet references, ASSOCIATION: Khar"Zovskiy filial Vsesoyuznogo naiiohno-issledovatellskogo inatituta khimicheskikh reaktivov (Kharlkov Branch of the All-Union Scientific Research Institute of Chemical Reagents) PRESENTEDi May 11, 1960, by I., V. Obreimov, Academician SUBMITTED: April 29, 1960 Card 2/2 BENGUS, V.Z.; KOMIK, Generation of dislocations in calcite crystals. Kris tallografiia 6 no-4:599-604 Jl-Ag 161. (141RA 14:8) 1. Vsesoyuznyy institut khimicheskikh reaktivov, Kharlkovskly fil-tal. (Dislocations in crystals) (Calcite crysta~Ls) BENGUS) V.Z.; KONNIK, S.N.; STARTSEV, V.I. Certain phenomena observed on the bounds ies of a twijMJ49 interlamination in calcite. Kristallografiia 6 no./+:614-620 JI-Ag 161. (14IU 14,:8) 1. Vsesoyuznyy institut kbimicheakikh reaktivov, Kharlkovskiy filial. (Dislocations in crystals) (Calcite crystals) ini 2 :02 5 46-:-( 1~ ~ ! f '7 S-0 TIT--L~ -Ay. Q8 4 - been 4 - intir-I -1 ~jo "pir t-n e IL 0 -K a -L n 3, re o, are cl ZI C r int e--- a ' L- ined ~x- e r , z , t an p c~ n r curd M., o c n j t II S Dt~ - !7~, 's ion-I cccu-jiel o 9 i on s T.-, c"! a b 17e 1 7 r c c r i z e k) c on s r c at c w in lliolr L -a' a r -, A it i n -'ce C, P s PX r.% 'A I ra,,-,rn ar -twin ay ti r cou (I studted by the m e h c,~ r c d o i ~D s durina m0 cn w, I au~`.c rs e s :~ r J- e the curlril-inear motion of d i I ,) c a r~ 1, C !.,~j a 7 7 d o n.,7 mcv,~~ 4P one slip plane but In diff~1ro-n- T ir, c, 41,; n d i s I c c i o n 3 is essential- ly d e t e~~- a -~ o m --:?d 1~z c e he. i r m o b 11, i t y e ji-slcca-icrls is displayed by freshly ;7rrw~~ ry 1--i e o -indar pre~cure.- 4 s hen m Ti n Card 25312 S/020/61/138/005/012/025 Motion of dis.7ccations in antimony En I r,14 / B 2 0 5 can be prevented by,aging at temperatures.0f.300-400 OC, or by storing the specimens for several months. Besides, the mobility of dislocations is markedly reduced, which fact reveals the effect of air. In connection herewith, the reader is referred to A. Kh. Kottrell (Dislokatsii i plasticheskoye techeniye v kristallakhp 1958, p. 158). Finally, the authors discuss a method used to demonstrate the motion of dislocations in a 2ingle crystal. A thoroughly grown single crystal is known to con- sist of a mosaic-like arrangement of blocks. The dislocations are situated on 'lie edk;es of the blocks which are mutually disoriented to a low degree. The dislocation density is directly related to the degree of mutual discrientation of two blocks. When such a crystal is annealed, the boundaries.of the blocks are sh4fted and, consequently,-the disloca- tions starto moving. These processes can easily be visualized by a proper treatment of the crystal- F. F..Lavrentlyev and V. 7. Bengus are thanked for valuable discussiors. There are 4 figures and 12 references: 7 Soviet-bloc and 5 tion-Soviet-bloc. The most important references to Englisli-language publications read as follows: J.J. 3-ilman, W.G.John-ston., J. Apple Pi-Ys- 30, no. 2, 120 (19r,-9); Internat. Cont. Lake Placid, 1956, 1957, P. 116; C.S, Barret, Trans, Am. Inst. IMlining and Met. Eng. 161, 31 Card 3/5 25W S/020'61/138/005/,,)12/025 I/ Motion of dislocations in antimony B104/B205 (1945). ASSOCIATIO: Fiziko-te khnicheakiy institut nizkikh temperatur Akademii nauk US-SR (Institute of Physics and Tech nology of Low Temperatu res of the Academy of Sciences UkrSSR) PRESENTED; MI-arch 7, 19,61, by G. V. Y-urdyumov, Academician SUBLIMED: March 4- !96~1 Card 4/5 L, ~-010 S/020/61/141/003/007/021 B-100212 AUTHORS: Bengus, V. Z., Komnik, S. N`-, -,4;--d Startsev., V. I. TITLE: Motion of twinning dislocations in calcite PERIODICAL: Akademiya nauk SSSR. Doklady, v. 141, no. 3, 1961, 607-610 TEXT: The mechanical stress which starts the motion of twinning disloca. tions, is an important factor in the description of twinning processes. The present paper reports on tests which have been performed to determine these stresses. The motion of twinning dislocations was observed by the method of repeated etching suggested by J. Gilman et al. (Dislocations and Nechan- ical Properties of Crystals, N. Y., 1957, P. 116). The mechanical stress which caused the motion of twinning dislocation, was induced by pressing the diamond pyramid of a nMT-APMT-3) microhardness device into the specimen. BY varying the load of the diamond pyramid that load was determined, at which twinning dislocations started moving. For the calculation of the forces acting on each dislocation, strain-field formed by neighboring dislocations had to be allowed for. The stress required for starting a motion ranged between 60 and 15 9/mm2, and was dependent on the amount and character of the neighboring dislocations. The authors voice the opinion that these ORrd 1/3 3 0 172 0 S/020/61/141/003/007/021 Motion of twinning dislocations ... B104/B212 values might permit the determination of interaction forces between dis- locations. The establishment of equilibrium distribution for dislocations in accumulations was analyzed. Results point to the fact that the resist- ance of dislocations to a motion is equal for all dislocations and -is equal to the starting stress. If there is no external stress, then the following relation will be valid for the starting stressI5~ - 6' n Gb when 0 o - L (I-V) denotes the number of dislocations in ail accumulation G the shear modulus b the Burgers vector, L the length of the accumulation, and V Poisson's ratio. This expression was derived on the assumption that the barrier be sufficiently long, that the dislocations be arranged in straight lines, and that the f0rce acting on a dislocation be evenly distributed. Test results are compiled in Table 1. The large spread of 6~ is caused by the curvature of dislocations and similar properties of the crystal. The authors thank A. I. Landau and L. A. Pastur for discussions~ There are 2 figures; 1 table, and 8 references: 3 Soviet ani 5 non-Soviet. The three most recent references to English-language pullications read as follows: A. H~ Cottrell, B. A. Bibly, Phil. Mag 42, 57-41 (1951); J. Eshelby, F. Frenk; F. Nabarro, Phil. Mag., 42, 351 ~1'951); J. Bhimasenachar, Proc. India,~. Card 2/3 S/020 61/141/003/00'7/021 Motion of twinning dislocations ... B104/B212 Acad. Sci., A22, 199 (1945)- ASSOCIATION: Fiziko-tekhnicheskiy institut nizkikh temperatur Akademii nauk USSR (Physicotechnical Institute of Low Temperatures of the Academy of Sciences UkrSSR) PRESENTED: June 3, 1961, by I. V. Obreimov, Academician SU BMITTED- June 3, 1961 Table 1: Test results. L. cm a.. r1m1w, 130' 0 1111 45 26 0:011t W 96 0:0635 357 0 150D 94 26 0,0170 60 27 0,0112 95 23 0,0134, 67 33 O,Ot27 102 15 0,0068 86 45 0,0M 138 Card 3/3 s/i26/62/013/003/016/023 E091/E135 AUTHORS: Lavrent'yev, F.F., and St.artsev, V.I. TITLE; On the structure of the accommodation region in monocrystals of zinc and bismuth PERIODICAL: Fizika metallov i meta-Ilovedeniye, V.13, no.3, 1962, 441-450 TEXT. Bismuth and zinc were purified by zone refining, and monocrystals of these metals of high purity were obtained. Specimens were cut from the monocrystals along the cleavage plane at liquid nitrogen temperature (in order-to reduce deformation by slip). on splitting a crystal, stresses are set up under the action of which twinning bands form. Therefore, application of additional stress for the production of twins and accommodation regions is unnecessary. The specimens were studied with a .'metallurgical microscope, using oblique illumination, and with a microinterferometer. In order to expose dislocations in bismuth, monocrystals of this metal were etched in a solution consisting of 10 parts H2SO4, 10 parts H20 and 1 part HN03 (67%). Card 1/1 ,On the structure of the ... s/i26/62/013/003/016/023 E091/E135 The zinc crystals were irradiated with a converging beam and then annealed. A special attachment to the metallurgical microscope was constructed by means of which changes in the accommodation region during annealing could be kept under constant observation. After annealing, the zinc crystals were again irradiated and studied metallographically, Polygonisation of accommodation regions was observed to occur when the dimensions of the latter exceeded 100 Ii. on annealing, fusion of blocks of polygonised accommodation regions occurs. The algebraic sum of the angles ,between the blocks agrees well with the resultant angles between blocks produced after fusion, which confirms the dislocation struzture of the accommodation re-gion. Selective etching of monocrystals of bismuth showed that dislocations concentrate at the boundary between the accommodation region and the parent crystal. In zinc crystals no polygonisation of accommodation regions of less. than 100 ~A dimensions takes place during only a decrease of the width of this region occurs. .Accommodation regions, thedimen*lons of which are less than ;15 -~L, disappeared completely after annealing for 5.hours at Card 2/3 S TA E "', S., J'SEV, V. 1. Disstlrt~.tion iefended for the derree of Doctor Of Physicow-themntiral .Scienres nt the Institute of Crvstqllorrp..ohy in 1962: "ExnerimentnI Investi~!ations of Crystal Twinning nnd Several Relqtel Pheno~en,n." Vest. A]-n,l. N-uk SSSR. No. 4, Moscow, 194-3. ga-'es 11Q-145 L 1303~-63 EWT(l)/E!NP(q)/EWT(m)/BDS AFFTC/ASD/ESD-3 JDIJWIJG ACCESSION AP3o00677 -----s/oiSi/63/oos/oo,9/1377/1385 AUTHCR: Pariyskiy,, _ V. B ; Landau, A. --L ; Startsev~_ V. 1. TITLE: Jerky motion of dislocation?~n si)4[e !~I~Of LlF SOURCE: Fizika tverdogo tela., v. 5j, no. 5., 1963.- 1377-13850 ;TOPIC TAGS: dislocation, LiFJF barrier.,etching test., dislocation lwp,, a=ea~ing) 'dislocation motion jerk.. irregular motion dislocation movement, dislocation Jump, ,ABSTRA.CT: The authors have made a stvdy of jer1W movements of.dialocations . in single crystals of LiF with various impurity contents. The samples were given preliminary annealing treatment for 5 to 24 hours at 7,90-800C and then etched.. either by a weak aqueous solution of Fe ions or by an etchant such as SR-4-. -,Wo external stress was applied. The etching tests revealed multiple-dislocat ion loops and jerky displacement of the ends of the loops. Time intervals between successive jumps were measured, and the velocity of dislocation motion proved to be on the order of 5 microns X-r second. The experU2ental results show that between repeated etchings of a particular. crystal the intensity of jer1W motion drops very markedly. Hardly a single new jump will occur betureen two successive ~etclhings within a period of 1-2 minutes. The authors'rcl-e~+, a nimiber of possible Card 1/2 L 13033-63 ACCESSTON NR: Appoo617 exple mations previously proposed, and they conclude that the Jerky motion,is! ~associated with periodic restraints placed on the dislocations at barriers. such barriers may be dislocations of other slip systems., packing defects,, acammlation. of vacancies or impurity atoms,, or other flaws. These barriers are removed successively by etching the crystal surface, freeing the end of the dislocation to move till it is pinned at a new barrier. "In conclusion, the authors express their'! gratitude to L. M Soyfer for his aid in the work and'also to )r. Y1. Borzhkovskya for getting the manuscript ready for printing." Orig. art. has:. figures, 2 tables, and 2 formulas. ':ASSOCIATION: Fiziko-teanicheskiy institut nizkikh temperatur AN USSR.. Kbar1kov (Physicotechnical Institute of T-Ow.Temperatures, AcadenW of Sciences,, USSR) SUB14ETTED: 27Dec62 DATE ACQ: 11j=63 ENCL,.. SUB CODE: 00 NO PEF SOV: 004 OTM: 005 eard 2/2 -------------- -L-18099-63. -WTW/EW(q)/1WTW/BDS.-, -AFFTC/ASD/=-3----.,-JD-....----., ACCESSIMI NR: AP3004101 S/(io?0/63/008/004/0632/0640; AUTHORS: Starteev. V. I Benrus, V. Z.;- Koppik, S. N.; Uvrentlyei, F. re ML LE: Interaction of dislocations,,-during twin growth in crYstals .SOURCE: Kristallograftya, v. 89 no. 4, 1963, 632-640 'TOPIC TAGS: dislocation, interaction, crystall twinning, zinc, calcite, relief ~ABSTRACT: The authors have studied the interaction of &I slocations in zinc end .calcite crystals. A high density of tm~nning diEl.ocations and their paired correl'a- ~tives-in the neighboring edges of fine twin lz,;rars in calcite have been detected experimentally. It has been f oun6 that the stress necessary to shift the edge of A thin trin layer (less than 1/4) is much greater-than that necessary to move the ~trrin edge of a thicker layer. Different Idnds of pile-tips of twinning dislocations Were observed experimentally at the edges of tvdn layers. Tt has been shown that :the distribution pattern of dislocations in these mle-ups is deterudned by the typ ,of deposit. Experiments have also proved that the region of accommodation L ,repelled from the tviih boundar~r in zinc crystals (because of the interaction p'f trinring and unit dislocations. It has been shovin that the lack of agreerent be- .tween the experimentally measured relief created by t nning in zinc and the relief .Card, 1/2 L i8ogg-63 :ACCESSIG! FR: AP3004102 plotted'from geometrical constructi ons is due to slippage In a twin. The Inter-, t. action of twinning erd uni.t dislocations dnring untwinning of zinc crystals leads ;,'to the formption of nonbasic partial dislocations ((observed experimentally), Which ;MLrT be the causo of increased strength. Orig. art. has: 6 figures. ASSOCITATTIM: Fiziko-tekhnichesldy institut nizldkh temperatur AN" USSR Mysical and Technical Institute of Low -Teir-perBtures, Acadev7 of Sciences, Uk-- einim SSk)_1 SUBUTTED- 061.ar63 DATE ACQ: 15Aug63 SUD CODE: PH NO R Mr S OV: 0 07 Card 2/2 :ACCESSION NR: AP4033100 S/0120/64/000/002/00,1.4/OOZS AUTHOR: Afanaslyev, N. G.; Vy*sotskaya, A. V.&* GoVdabisyn, V. A.; Startsev, V. L TITLE: Using a double -focusing magnetic spectrometer for recording & w~ide ,.part of an electron spectrum SOURCE: Pribory* i takho'ka eksperinenta, no. 2. 1964, 24-28 TOPIC TAGS: spectrometer, nagnetic spectrometer, double focusing magnetio spectrometer, electron spectrum. nuclear science ABSTRACT: A uniform-field spectrometer with a thick nuclear photoplate mounted along the focal line as a detector was used for recording a wide spectrum. Calculation and experimental verification of the focal line are horizontal and vertical aberrations are calculated; the vertical form of tLe spectral line for Z- and 4-mm-dlam ter sources was estimated and nwasured. Cam 1/2 ACCESSION NR: AP4033100 The resolution, aperture ratio,, and line form of the spectrometer war* accurately determined by the photo method.aThe resolution, 0. 2 and 0. 4%. and. the aperture ratio, 0. 95z 10-2'and 0. 38z 10- star, for the above sources. respectively. were found to be almost constant for the entire energy range wA In good agreement with their estimated values. Orig. art. has; 9 figures, 16 formulas, and 3 tables. ASSOCTATION: Fiziko-t*khi4cheskiy institut AN UkrSSR (Physico-Tochnic&l Institute, AN Ukr&19R) SUBMITTED: l8U&y63 DATZACQ: 1lU&y64,-, ZNCL: 00 NO RZr SOV. 00. SUB CODE: NS 002 0TK=Z 0 r.'A 7/7 V Card 3/3.- ACCESSION Wit AP4039652 AUTHORSt Soldatoy, V. P.; Startosev, Ve J9 TIME: Elastic twinning in biamth crystals. S/01OV64/006/006A67IA674 SOURCE: Fizika tverdogo tela, v, 6. no, 6,, 19640 1671-1674 TOPIC TAGS: elastic twinning, bismuth, lattice defect., twin wedging ABSTRACT: The setup fvr inducing elastic twinning is illustrated in Fig. 1 on the Enclosure. Tho load was measured by a slotted spring dynamometer with an indicator (with a precision of 25 g). The sample was immersed in liquid nitrogen for the experiment. Twinning developed in Bi at this teuqierature by the appearance of elastic twins, much like the growth of twins in calcite and antimony at room teuperature. At some value of internal atresas thin wedge-like twin layers formed under the knife edge or near it,, growing with increase in load. In their experi- ments, the authors were unable to determine any definite relationship between thickness and length of the elastic twins. It was necessary always to apply some finite load to the crystal to induce the elastic twinning. This value varied from experiment to experiment,, but was alwayL; smalls near 0-3-0.5 kg, This suggests some incipient mechanism for the formation of such twins. The actual causes may Card 1/3 Acc&%sioN wit APW39652 be many. It is concludod that each act of acquirine and of losing twinning leaves its trace in the crystal. Defects are apparently formed in the crystal lattice where twinning develops, and these defects accumulate with increase in number of loading cycles, facilitating the wedge-like growth of the elastic twins. Gliding may be an important factor in this twin growth. Orig. art. bast 4 figures. ASSOMSION: Fiziko-tekhnicheskiy institut nizkikh temperatur AN UkrSsR xharkov (FIVaicotechnical Institute of Low Temperattwas AN UkrSSR) SUBMITTEDs 17Dec63 ENCLt 01 SUB GODEs SS ND REP SM 006 OTHERs 000 Card 213 ACCESS ION NR: AP40396$2 Fig. I, Setup for deforming samples 1- sample; 2- kMfe odgej 3- cleatf,* ENCLOSURE: 01 Card 313 AFAMASIYEV, M.G.; TfSOTSKAYA, A.V.; C-OL'DSHTEYN, V.A.z DEMIYAHOV, A.V.; 0 STIARTISEV, V.I. Magnetic spectrometer for electrons with an energy up tc 100 M6v. Prib, ~L tekh. eksp. 9 no.5,.48-54 S-0 164. (MIRA 17.12) 1. Fizika-tekhnicheskiy inatitut AN UkrSSR. j. L 25086-65 , A ACCESSION NR: APS003424 aid of a knife-edge indentor. The layer crossed parallel faces of the crystal, thus ensuring a constant crystal cross section during the.deformation process. The expansion of the'stable twin layer wag F; by means of pure shear deformation at a constant rate. The-deformav-' tion rate could be varied in the interval 0.1--104/sec. The de- pendence of the width of the layer on thetime, and also on the ap-. plied load, were measured. The load was measured accurate to +5 9 and the expansion of the layers was observed directly-in a micro- scope (polarized light) under magnification much larger than 200. The defect structure of the crystals was displayed by selective chemical etching. The results.are shown that natural *calcite -- crys-, tals have different defect'structures. The density and the chara6- ter of the distribution of the dislocation and of-the background are highly varied. It is shown that the kinetic of the expansion-of stable twin layers in crystals of calcite is determined bythe de- fact structure of the crystals. The process of expansion of the stable twin layers in the calcite is controlled by the creation.of Card 2/3 STARTOSEVI-V-.I., inzli.; STRELICHENKO, I.I.; ANTIPOV, V.A.; BOYKO, A,M.; PILIPENKOY G.I.; STOLIKA, S.I. Performance of Communist YouLy, League brigades. U9011 39 no.11:27-32 N "64. (MIRA 18:2) 1. Kombinat- Kuzbass ugoll (for Startsev). 2. Shakhta NO.5-bis "Trudovskayall (for all except Startsev). 'kh Ur s bu U r a Fiz: '-Jliar I 1-ov. - Z" : - , f . . ,L cn G 1 cr , a.,i I - I ing ".c. MI. 4 9 LORTKYAN, M.P.; STARTSEV, V.I. Simple stable source for light flashes. Prib, i tekh. eksp. 10 no.i: 219 Ja-F 165. (MTRA 18:7) 1. Fizicheskiy institut Gosudarstvennogo koniteta pa ispolIzovaniyu atomnoy energii SSSR i Fiziko-tekhnicheskiy institut AN UkrSSR, L 00736-66 EFF(WEXT(M) RM ACCESSION NR: AP5022694 UR/0181/65/007/009/2607/2611 ~i Startsev, V. V-', Snigirev.- V. G AUTHOR: Bolshutkin, D. N.;Leontlyeva, A q iV TITLE: Hardness of crystalline metha SOURCE: Fizika tverdogo tela, v. 7, no. 9, 1965, 2607-2611 TOPIC TAGS: hardness, methane, solid state ABSTRACT: The authors study the effect of temperature on hardness and creepin polycrystalline methane at nitrogen and hydrogen temperatures. Since methane is tively dissolved by nitrogen and hydrogen, the specimens were prepared and their a c hardness was determined in the same hermetically sealed cryostat. The specimens were transparent without visible flaws and had a smooth horizontal surface. The hardness of the methane was determined by.sinking a conical indenter into the speci.- men. The loading unit of the instrument consists of a metal cylinder with a weight, of P = 600 g. On the lower section of the cylinder are three conical indenters 1- -- with vertex angles of 900 located equidistantly around the cylinder. Penetration of the indenter was monitored on a cathetrometer with an accuracy of 0.01 mm. In determining the hardness, penetration of the indenter is given as h = h1+ h2 where hl is penetration under a load P1 10 g, which is read on a spring indicator; h2 rd 1/4 from which the following relationship was derived for calculating the hardness (VT - 0-1 The hardness of crystalline methane is given as a function of temperature in fig. 1% of the Enclosure. Curves for argon and krypton are given for comparison (C. Treppg,,..- Schweizer arahiv., Bd. 24, 191, 230, 1959). A reduction in temperature was found to reduce the creep effect in solid methane. A physical explanation is giveA for the effect of temperature on hardness and creep on the basis of the dislocation ,Card-28. L 9252-66 P(15) ijp~c) ACC NRz AP5022724 SOURCE CODE: UR/018fi6~-i--r)o-7iOO-9/2789/2792 AUTHOR: Bol'shutkin, D.__ Prokhvatilov, A. I.; Sillvestrova, T. V.; Startsev -t_ ORG: P~ysicotechnical Institute of Low Temperatures All UkrSSR Kharkov (Fiziko- nstitut nfz-kikh temperatur AN UkrSS--Rl- tekhnicheskiy i I TITLE: Mechanical properties of polycrystalline ammonia under unilateral compres- sion SOURCE: Fizika tverdogo tela, v. 7, no. 9, 1965, 2789-2792 TOPIC TAGS: ammonia, solid mechanical property, low temperature ~vs _p ABSTRACT: The strength and ductility of polycrystalline ammonia are studied as func- tions of temperature under unilateral pressure. Cylindrical specimens 10 mm in dia- meter and 40-mm long with uniform microstructure and polished ends were studied at temperatures from 77 to 160OK4 Curves are given for the breaking point, limit of proportionality and relative com resolon as functiona of tompanturo. Thena data show that crystalline ammonia ~4 extremely low strength properties and ductility. Solid ammonia is quite brittleiat the temperature of liquid nitrogen and shows elas- tic deformation right up to the breaking point. At stresses of 0.5-0.6 kg/mm2,cracks are formed parallel to the axis of the specimen with an accompanying characteristic Card 1/2 L 92D-2-66- ACC NR: AP502272 4 sound and a slight reduction in loading (up to 100 g). The final breaking stress of IvO.8 kg/mm2 remains constant throughout the experimental temperature range. At this point there is an instantaneous reduction in loading to zero and the specimen is shattered. The shape of the fragments and the slight degree of deformation before the breaking point show that cleavage is the mechanism responsible for fracture of ammonia crystals between 77 and 1300K. Above 1300K (0.6 T ), the ductility of the M specimens increases and creep is observed under a constant load. Shearing is respon- sible for fracture above this point since cleavage strength remains nearly constant wiib temperature, while an increase in temperature causes a considerable reduction in shearing strength. The relationship between rate of uniform creep V and stress a is V= AGn, where A and n are constants equal to 500 and 5 respectively at 1600K and stresses greater than the limit of proportionality. The energy of creep activation is found to be 5.6 Kcal/mol. This is approximately 10% lower than the,heat of sub- limation for solid ammonia. Orig. art. has: 3 figures. SUB CODE- 07,20/ SUBM DATE: 16Apr65/ ORIG REF: OOS/ OTH REF: 010 PROKIFIATILIAN, A.I.; PUSTUIALOV, V.V.; SILIVESTROVA, T.V.; STARTSEV, V.I. Tempe-rature dependence of the har-aness cnf crystalilne wrnonla. Mkr.fiz.zhur. 10 no.10:1127 -11-352 0 165- (MIRA 19:1) 1. Fiziko-tekbziicheskiy institut nizKikh tempera-~ur AN LrvrSSR, Khartkov. Submitted December 15, 1964. L 17551--66 -VNT(1)1ZWT(*)1T1ZWp(t) IMC), OO/JD 'ACC NR: AP6004389. SOURCE CODE: ')591 .AUTHORS: -Soldatov, V. P.; Startsev, V. I. 1B ORO: PhyclaotechnIcal Triatituto of Low Tem eratureaq, Academy of 'SSR, (Fiz iko- tekGIche -,-fay it &iences S TM iAkademli nauk SSSR) TITILE: On the equilibrium shape of a twill which Is slowed down at .a n obstacle SOURCE: AN SSSR. Doklady, v. 166, no. 3, 1966, 588-591 :TOPIC TAGS: crystal growth, twinning, bismuth, single crystal, !crystal imperfection .ABSTRACT: The authors have i e,tigated th.Tsbape of a twinning layer growing into a bismfiW Tv ngle cr )under the influence of i ,.external force, for the purpose of obs g effects predicted theo- ;retically by A. M. Kosevich and L. A. Pastur (FTT v. 3, 1291 and 1871.' .1961), wherein the twin will have a zero apex angle if there are no obstacles preventing its penetration to the crystal, and an angle of Card 113 UDC: 548.4 L 17551-66 ACC NR: AP6004389 1800 in the presence of such an obstacle. The experiments were car- .ried out on single crystal bismuth samples in the furm of prisms :measuring 10 x 5 x 2 mm, in which the twinning plane (110) was per- The load was applied along pondloular to the face of the crystal. the (11o) plane And aliong, OW, plane (110) was the observatian 5urface. IM6 -_e~*ta f-bar- A4A. a thin wedgelike twin moves freely in the cr7stai w1thn7;*_' en-counter- Ing ob8taulas, It Into tho crystal zmootbly, like the point of a needle, remaining sharp all the and the twin thick- ness changes little, If an obstacle Is encountered in the form of a twinning layer of different orientation. then the growth stops, the ,thickness of the twin increases rapidly, and its, end becomes rounded ~Ofr. The radius of the rounded end Increases with pressure. Tf thae- lobstacle is very small, the deformation of the twin Is similar it-o A Ithat produced when the obstacle is in the form of a twinning layer. :A lenslike twin can be observed In such a case. The photographs of ithe different twin formations agreed with the theoretical predictions. Authors thank L. A. Pastur., V.__AA . Bengus_, alid S.-V. Lubents for a discussion of the work. This report was presented by Academician I. Card 2/3 - . - I - - -1-- -- - . -- . I --- -- -- - - 11 L 29986-66 EWT (1)/Ewr.(m)/T/EWP (t)/M IJP(c) jp/GG ACC IM: AP6Oi24qo SOURCE CODE: I UPIOIBI/66/008/004/122VI238 I V. B.; Lubenetsp S. V.*. Startsev V. 1. AUTHOR: I?ariyskiy ORG: Physicotechnical Institute of low Teaiperature%AN UkrSSR, KbarlkcAr (Fiziko-6~; tekhnicheskiy institut nizkikh temperatur AN UkrSSR) TITLE: Mobility of dislocationirin single-crystal potassium.bromide SOURCE: Fizika tv-erdogo tela, Ve 8. no. 4.. 3966p =7-1238 TOPIC TAGS: potassium bromide,, single crystal# crystal dislocation phenomenonp i shear stress., crystal deformation ABSTRACT: In view of the fact that the experimentally observed connection between the speed of dislocations and the applied voltage In these crystals have not yet been fully explained theoretically, the authors have attempted to obtain different information on the character of dislocation motion In single-crystal KBr, in vhich the motion of dislocations has not been heretofore investigated. The tests were a and with tortali, de with annealed single crystals with dislocation density 103 Cm-2 M impurity content 2 X 10-2%.' The dislocation structure was e~khlbited by means of anI etching p:eocedure described by the authors earlier (KristaLlograftya v. TP 326, 1962). The notion of the dislocations was observed by applying mechanical loads in! different manners (compression with a deformation nachines static load producing Card 113 L 29986-66 ACC NR: AF6oi24qo pure flexure in an etchant., pulsed loading of long duration (2 X 10~-2.sec and above) or short duration (10 -10-8 sec)). In addition, a special system was developed, i which made it possible to produce a rectangular loading pulse and measure the Mag- i nitude and duration of the applied load directly during the loadingj, azA regulate the applied load (Fig. 1). The"operation of the system Is brieflar described. The results show that below a definite shear stress the dislocations hardly moves but above approximately 80 dmm2 the dislocation velocity increases rapidly and then increases' at a slower rate. There was little difference betweed edge and screw dislocations. The results exhibited a certain similarity with previously observed data for NaCl and LiF. The obtained experimental dependence of the dislocation speed on the applied load cannot be described in terim of Wiingli- thermal acti:v~- -J, Ltion process with a constant activation volumep since this volume decreases by approximately 400-times on going from small velocities to larger velocities. The results also confirm the effects proposed by W. G. Johnston and J. J. Munn P. Appl. Phys. v. 30, 20P 1959)p wherein the dislocations are first accelerated within a very short path (smaller than 1.7 p),-aftfjr Vhich they move uniformly. The delay of the dislocation motion foLlowing application of pulsed.load decr&..3es exponential3ty with Increasing load. Orig. artb !Ass 9 figures am.6 foroaas. 2/3 Card L 29986-66 ACC NR: Ar6om4go Fig. 1. Pulsed loading 4 equipment for XBr crystalse 1 - Force relay., 2 - time relay., 3 - power source, 4 -.power supply block, 5 - tension metering equip- t ment, 6 - tension gauge, 7 - dynamotorp 8 sample, 3 9 - oscilloscope. :SUB CODE: 2D/ sum DATE: 26.Aa5/ MW Mwt WS/ OM MW: 007 card 3/3 J6 L Oh672-67 FdT(1) /E74T(m) /T/F7dP (t) /ETI IJP(G) 0 (,- /j D ACC NR, p6o24455 SOURCE CODE: A -1/66/oo8/ooVl994/2ooc 'UTHOR: Platkov, V. Ya.; Startsev, V. I. ORGE: Yhysicotechnical Institute of Low.Temperatures, AN UkrSSR, Ehar1kov (Fiziko- tekhnicheskiy institut nizkikh temperatur AN UkrSSR) TITLE: Amplitude and time dependences of the internal friction in ionic crystals SOURCE: Fizika tverdogo tela, v. 8, no. 7, 1966, 1994-2ooo TOPIC TAGS: internal friction, ionic crystals, crystal dislocation phenomenon, Young modulus, relaxation process, plastic deformation, temperature dependence ABSTMCT: The authors present the sults ot an I estigation of internal friction due to the presence of slacatinapirin sinaltz KBr, KC1, Bbl,-Iand in part Wl~ Al" The internal friction and Young's modulus were measured using alloTble compound oscil. lator in which the ultrasonic oscillations were produced by X-cut quartz excited in the natural longitudinal mode (77.7 and 90.5 kcs). The sample was cleaved along the cleavage plane and glued to the quartz. The different crystals were made of differ lengths, such that the difference between their natural frequencies and the natural frequency of the quartz did not exceed 500 cps. The measurements were made at 4.2, 77, and 273K, maintained constant within �0.1*. Plots were obtained of the internal friction and Young's modulus against the amplitude of the strain, the variation of Young's modulus during excitation, the variatiorL of the depth of relaxation of the modulus as a result of prior plastic deformation, And the influence of temperature on Card 1/2 ACC INR: AP6024455 0 I the depth of the relaxation of Young's modulus. The relations obtained were found to be in qualitative agreement with the Granato-Lucke theory. A hysteresis was observed in the Young's modulus relaxation in the amplitude-dependent region. The influence of prior plastic deformation and of the temperature was investigated. A qualitative explanation of the observed results is presented. Or~--g. art. has: 8 figures and 2 formulas. SUB CODE: 2o/ suBm DATE: oloct65/ ORIG REF: 003/ 07H MW: W4 kh Card 2/2 C ~N'R; AP60~9635 AUTHOR: Afanas'yov, N.G...Startsev V.I.; Smelov, Ye.y.; ,Cuplennikov, E.L.; Stepula, Ye.V.; Petrenko, V.V.; Furs ov G.L. ORG: none fV1 40 TITLE: Investigation of elastic scattering of 70 h'eV electrons on C-12 and Be-9 and the mean square radii of those nuclei /Report, Fifteenth Annual Col~ference o-nNuclear Spectroscopy and Nuclear Structure, held at Minsk, 25 January to 2 February 1965/ SOURCE: AN SSSR. Izvestiya. Seriya fizicheskayn, v. 30, no. 2, 1966, 371-377 TOPIC TAGS: electron scattering, elastic scattering, form factor, nuclear radius, beryllium, carbon ABSTRACT: The authors have measured the elastic scattering cross sections of C12 and. Be9 for 70 MeV electrons at different scattering angles between 30 and Mo in order to evaluate the root-mean square radii of the nuclei. The 70 MeV electron energy was- chosen for the measurements because at that energy the momentum transfers are high enough to permit determining the momentum transfer dependence of the form factor, an yet low enough to allow of neglecting higher powers than the second (of the momentum transfer) in the expression for the form factor. The electron beam was produced by a pulsed accelerator. The primary beam intensity was measured with a secondary emission monitor which was calibrated with a Faraday cup. The electrons that were 1/2 ACC NR: AP6019635 elastically scattered at a given angle from the graphit olyethylene or beryllium effl p foil target were focused with a magnetic field onto a Cerenkov counter which recordeq the'. The scattering angle at which scattered electrons were recorded could be changod without bre.-king the vacuum. In addition to the mqnsurements with the Cerenkov count9F measurements were ioalized with photographic recording of the scattered electrons. A12: though some of the corrections involved in the different techniques are different fl (the corrections are discussed at some length), the cross sections measured by the tvio; different recording riethods were in excellent agreement. The values obtaingd from the momentum transfer dependence of the form factor for the rms radii of Be and C were 2.26 t 0.1 and 2.35 � 0.01 fermi, respectively. Orig. art. has: 12 formulas, 5 figuress and 3 tables, SUB CODE: 20 SUBM DATE: 00 2/2 hs ORIG. REF: 004 OTH REF: 002 ACC NR, AP603h224 AUMOR: Afarjas'yev, N. V. J.,; Shevchenko, N. G. SOURCE CODE: UR/O12o/6U6/O00/0O5/ooqo/ooq4 G.; Denyak, V. M.; Reva, D. P.; Savits7edy, G. Aj,.Startsev, ORG: Khar'kov Physi cote chnical Institute, iLki-Ukr-~SIZ(Fiziko-technicheskiy institut AN U k t SS (,) ) TITM: A cherenkov counter for recording high energy electrons SOURCE: Pribory i tekhnika eksperimenta, no. 5, 1966, 9o-94 TOPIC TAGS: radiation counter, nuclear physics ap aratus, electron detection," 1 P15 0- -/- P6 /)-7 -5 7-&,1'0- ABSTRACT: A Cherenkov couhter serving as a-detector of fast electrons at the output of a,magnetic spectrometer is described. The counter is-designed to detect electrons with Ee > 100 Mev. from linear accelerators with sendings durations ranging from 0.2 to 2-5 Psec. -The electronic circuit of the counter includes a scaling circuit with a ratio. of 1:4 and with the resclutioh Of 30 nsec) a pulse forming circuit, and passing circUit which permit counter operation to be synchronized with the electrons accelerator. The time resolution of the counter (50 nsec..) permits recording of up to 4 pulses for each sending.from the accelerator. Recording effectiveness is near 100%. The authors express their gratitude to V. V. Kondratenkol S. D. Faynizlberg, A. I. Germanov , and L. A. Makhnenko. for the development of the device. Orig. art. has: 5 figures. SUB CODE:20 / SUBM DATE: 03Aug065/ ORIG REF: 003/ OTH REF: 003 ACC NR- AP7001978 SOURCE CODE- GE/0030/66!()18/002/0863/0871 AUTHOR: Startsev, V. L; Soldatov, V. P.; Brodsky, M. M. ORG: Physicotechnical Institute for Low Temperatures, Ukrainian Academy of Sciences, Kharkov TITLE: Growth rate of twin layer in bismuth single crystals SOURCE: Physica status solidi, v. 18, no. 2, 1966, 863-871 TOPIC TAGS: bismuth, single crystal growth, twinning, single cryntal, activation -bnorgy ABSTRACT: An attempt is made to determine the stress relationship of the normal and tangential rate of twinning in bismuth single crystals of different puri- ties. On the basis of experimental data, it is concluded that the broadening of twin layers occurs by a heterogeneous mechanism. The activation energy is determined for the processes of twin layer broadening and twin growth in the direction-of shear. It is established that 'the process of-twin layer broadening in bismuth involves the simultaneous reorientation of about 104 atomic planes and Card 1/2 ACC AP7001978 that the 10 to 102 twinning dislocations participate in each plane per centimeter length of twin plane in the direction of shear. The authors thank S. N. Komnik, F. F. Lavrentov, V. B. Pariiskii, and V. Z. Bengus for valuable discussions. Orig. art. has: 8 figures and 15 formulas. `13ased on authors' abstract] (NTJ L SUB CODE: 20 ISUBM DATE: 01Aug66 /GRIG REF: 006 /0TH REF: 009/ Card ACC NR: AP6034245 SOURCE CODE: UR/0120/66/000/005/0229/0230 I f AUTHOR: Afanas'yev, N. G.; Denyak, V. M.; Startsev, V. I. ORG: Physics-Engineering Insitute,'AN UkrSSR, Khar'kov (Fiziko-tekhnlcheekly Inotitut AN U`krSSR) TITLE: Generator of triple electrical and light pulses having a nanosecond duration SOURCE: Pribory i tekhnika eksperimenta, no. 5, 1966, 229-230 TOPIC TAGS: pulse oscillator, pulse generator, light pulse, nanosecond pulse, pulse multiplication ABSTRACT: A description is given of a simple oscillator of short (10'-8 see) triple electrical and light pulses, suitable for adUstlng of high speed scaling circuits, coincidence circuits, and for investigation of photomultiplier parameters. The advantage of such an oscillator is that it overcomes the shortcomings bf its prede- cessors which are capable only of single pulse outputs, either electrical or light signals. The input oscillator of the system develops pulses of 50 V with A duration front of 10 to 15 nsec and sequence freqaency from 1000 cps. Hydrogen dis- chargers are employed in the generator,. The pulse shift is achieved by an allternatins lag pattern having a magnitude of 0 to 0.5;,gsec. The width of the produced electrical pulses is 10 nsec, and that of light pulses, 50 nsec. Orig. art. has: 2 figures. SUB CODE: 09,14/ SUBM DATE:. 03Sep65/ ORIG REF: 005 - 1 . . L )I - . . , - H], --i~ Y v ~,, - - I U.:3e c)f hexamet.' v,-:~n:m-ne in 'he c)-,oduc,,tiron 0.1 t3 U~j ~l . ll~ I - -- . Trudy ',-~Ki;Tli no.47:95-98 164. Use of hcxameOiylen~:mincl in the product-1,--n of scda. Part 2. 1 b I d . - 17)'9 - 102 (~,IIRA 18:9) r;"y - ... j ~j JC2 AP6032C79 SOURCE CODE: IJR/0078/66/011/010/2312/2315 4.,?- - AUTHOR:- Startsev, V. N.; Krylov, Ye. I.; Koz1min, Yu. A. ORG: Laboratory of Rare and Rare Earth nferrous Metals TITLE: Extraction of tetravalent titanium from hydrochloride solution's using tributylphosphate SOURCE: Zhurnal neorganicheskoy khimii, v. 11, no. 10, 1966, 2312-2315' TOPIC TAGS: titanium, hydrochloride, tributylphosphate, titanium extractior ABSTRACT: A study was made of the extraction of titanium (IV) from hydro- chloride solutions using tributylphosphate (TBP). Measurements of the optical density of the solutions showed that when the amount of free hydrochloric acid in the solution is increased and the amount of titanium is maintained constant, or when. the amount of titanium is increased and the amount of hydrochloric acid is main- tained constant, the equilibrium of the reaction 112TiC1a:;-'DiC1,2- + Mff-' is displaced towLrd the formation of complex (TiCI612- ions. The same-'ratio for the distribution factor is maintained in relation to the amount of free hydrochloric acid and the. amount. of. titanium in the solution: it increases with an increase in th~_ Lcard 1/ 2 UDC: 546. 8241131:542. 61 ACC NR. AP6032,979 amount of coi-plex [TiClo]2- ions in the solution. A comparison of the optical densities of t'ic initial solution and the organic phase, as functions of HCI and the to indicate that the titanium passes into the ester layer- amount of titanium, seems in the form of a complex hexachlorotitanic acid .[TiCla) anion. Orig. art. has- 3 figures. [Based on authors' abstract] SUB CODE: ()7/ SUBM DATE; 19Dec64/ ORIG REF: 006/ OTH REF: 002/ 2/2 STAMIV, V.S. [Through the Southern Urals and the trans-Ural plains] Fb IUshnomu. Uralu i murallskim ravnin'sm. Taristskie marshruty. Moskva, Goegraf- giz. 1953. 215 P. (mak 7:111)) STARTSEV, V.S. Chemical geography of Perm Province. Xhim.geog, no.1:3-6 161. (NMRA 1633) 1. Predsedatell Prezidiuma Permkogo otdala Geografichookogo obshchestya SSSR. (Perm Province--Geoc~pjkiatry) EMSIPOVICH) G.A., prof., red.; BALKOV, V.A., dots., red.; VASILIYEV, B.V.0 dots., red.; GORMOVA, K.A., dots., red.; MIATVEYEV, D.K., dots., red.; 141MAYLOV, GG.K.., inzh., red.; OBORIN, V.A., dots., red.; PEGHERKIN, I.A., dots... red.; STARTSEV. V.S., dots., red.; SHIMIOVSKIY, L.A., inzb (Methods for studying karst; transactions] Metodika izu- cbeniia karsta; trudy. Perm', Permskii gos. univ. Nos. 2, 4, 5, 10. 1963. (MERA 17:12) 1. Vsesoyuznoye soveshchaniye po metodike izucheniya karsta. ACCESSION NRt AP4034065 S/0126/64/017/004/0627/0629 AMOR54 Volkenshteyn, N. V.j Romanov, Ye. P.; Starostina, L. S.; Startsevs, V. To, i TITLEt Temperature depeAdence of the electrical conductivity of nonoorystallino molybdenum ,SOURCEt Fiiiks metallov i metallovedeniye, v. 17, no- 4, 1964, 62T.-629 TOPIC TAGS: molybdenums electric conductivity, monocrystalline molybdenums polyoryetalline molybdenums cryostat, oopper molybdenum thermocouples phonon, 'electron electron interaction AIBSTRACTz The authors studied the temperature dependence of monocryetalline go having a high degree of purity and a relative electrical resistance on the order 0 R > 3500, where 4.2K stands for liquid helium temperatures Test 300 K 4 .2 K samples were obtained from a parent material of polycrystalline go rods 5 mm in diameter and 150 mm long, having a relative resistance of the order of 40. The approximate chemical composition wass 0.004% Fe, 0.001% $is 0-0005% Nit 0.0003% Un and Al, 0.0002%-'ba and Mg, &.0001% Cut and 0.0001% Na. Test specimens 4 mm in i diameter and 25 mm long were placed in a oryostat. Temperature neasureaents were I made with a dual copper-molybdenum thermocouple. The eleatrioal r*sistenoe mw Card ACCESSION WRt AP4034065 measured with a potentiometer set up with a galvanometer of sensitivity 5 X 10 -8 volt/mm/m. The data showed that the temperature dependence of the relative resistance was linear at temperatures above 10OKe From 40 to OOK it could lie well approximated by the formula Rr Ro. C ROD C + bTs. R0 10-6 a - rpaA-': whereas in the' Ro.C range of 7 to 18K it was found to fit the formula Rr Ro + AT', t Roo c Ro. r .A - 1'.5 - 10-o rPaA-1- :It was inferred from the results that in monoorystalline Mo of high purity the electrical resistance was determined essentially by electron-electron interaotions.-I 'For the sake of comparison the temperature dependence of the relative resistance of polycrystalline Mo was also plotted and was found to have a minimum at 26K. The authors thank V. A. Novooelov for his help in the experiments, Orig. art. hast 2 figuros and 2 formulas. ASSOCIATIONt Institut kristallografii AN SSM (Institute of Crystallograpbyt AN SSSR); Inatitut fiziki metalloy AN SSSR (Institute of Physics of Metalaq AN WSR) Card ACCESSION XR: AP4023404 S/0048/64/028/003/0540/0544 AUTHOR: Volkenshteyn, N.V.; Fedorov, G.V.;.j~a~~_ TITLE: Effect of magnetic order on the electric and galvanomagnetic properties of the rare earth metals Lffeport, symposium on Ferromagnetism and Ferrooloctricity held in Leningrad 30 May to 5 June 19637 SOURCE: AN SSSR. Izvestiya. Seriya fizicheskaya, v.28, no.3. 1964, 540-544 TOPIC TAGS: rare earths, resistivity, Hall effect, rare earth resistivity, rare earth Hall effect ABSTRACT: The authors point out that it would be desirable to measure the electri- cal conductivity and the Hall coefficient on the same pure samples of all the rare earths over a wide temperature range (down to liquid helium temperatures) under uni- form conditions, and they assert that they have done this. ZA-bstracter's note: No experimental details are given, nor any description of the techniques amploy-A The interest in measurements of this sort arises from the fact that, although the rare earths all have the same valence electron structure, the electric and galvano- magnetic properties vary greatly from one to another. Some of the results of the Card 1/3 ACCESSION NR: AP4023404 ,measurements are discussed in the present paper. With respect to temperature depen-i dence of resistivity, the rare earths divide themselves into two groups. rn La,Ce, Pr,Nd and Yb thoro Is no region in which the resistivity is a linear function of :temperature. The curve for Nd is given; it is smooth and concave to the temperature' axis. In Sm,Gd,Tb,Dy,Ho,Er and Tu the resistivity depends linearly on temperature throughout the paramagnetic region, and the curve has a sharp bend at the paramam- netic-antiferromagnatic transition point. The behavior of Eu (curve given) is very peculiar: there is no linear region (up to 3000K), and the peculiarity at the tran- sition point is very marked, there being even a small region in which the resistivi~ ty decreases with increasing temperature. This behavior is tentatively ascribed to ichanges in the conditions of scattering and in the energy spectrum of the current i .carriers. The Hall emf in all the rare earths is proportional to the Induction throughout the paramagnetic and antiferronagnetic regions. In some of the metals the current carriers are holes, and in others they are electrons* The number of carw riers per atom varies widely, from 0.17 (holes) In Eu to 3.5 (electrons) in Lu. The behavior of the Hall emf in the ferromagnetic region is very complex. Orig.art.has: 7 figures and I table. Card 2/3 ACCESSION ANTI: AP4023404 ASSCCIATION: Institut fiziki metallov Akademii nauk SSSR (Institute of Pbrsics of Yetals, Acadany of Sciencemp MR) SUBMITTED: 00 DATE ACQ: 1QApr64 EXCL: 00 SUB ;=E: PH NR REF SOV: 003 O-,LAER; 006 Card 3/3 ACCESSION NR: AP4019206 S/0056/6~/046/002/0457/0459 AUTHORS: Volkenshteyn, N. V.; Startsev, V. Ye. TITLE: Some features of the temperature dependence of electrical resistance of gadolinium and ytterbium at low temperatures DA" r.'Z IZhorn;il, plksper. I taor. fiz., v. 46, no. 2, 1964, 457-4 9 5 TOPIC TAGS: gadolinium, ytteebium, electric resistance, lcrti temper- ature electric resistance, electric resistance temperature de- pendence, electron electron interaction, conduction electron scat- tering,,spin wave scattering, phonon scattering ABSTRACT: In order to find how the special electron structure pf rare earth metals affects the nature of the temperature dependence of,.their electric resistivity, the resistance of gadolinium in the magnetically ordered state was measured and compared with that of ytterbium, which did not undergo a mag'netic-ordering transition over L ACCESSION NR: AP4019206 the entire i vestigated temperaLre range (1.5--20.3K). Thd em- pirical formula fitting tha experimental curve is 2 5 R(T)/R(OOC) = R /R(ODC) + aT + bT + cT 0 with different values of the constants,for the two metals in two temperature ranges (i.b--4.2 and 12--20.3K). The terms proportional to the different powers of the "Lemperature correspond to conduction- electron scattering by electrons, phonons, and spin waves. It is concluded t1hat at helium temperatures the conduction electrons. are, scattered in ferromagnetic gadolinium by spin waves, this type of scatteringibeing absent in nonferromagnetic ytterbium at the same temperature. "The authors are grateful to S. V. Vonsovskiy for his constant interest in this work and to Ye. A. Turov for useful dis- cussions. Orig. art. has: 2 figures and 1 formula. ASSOCIATION: Institut f iziki metallov AN SSSR (Institute of Physics 2/f Card V013ENSHTEYN, N.V.; WMANOVI, Ye.P.; STPRO~:TINA, Sr-.V, V.Ye, rn .emperature dependence of the electric resistaxice of a si,-,gle crystal of molybdenum. Fiz. met. i metallovGd. 17 no-4:627- 6,19 Ap, '64. (WEIR-A 17:8) 1. inaLitut Kristallcgrafli AN SSSR -' Instit,it fIzIkI metallov AN SSSR. L 15039-65 &-1TW/EPF(c)/9,,1P(t)/WP(b) Fr-4 AWLISSDIAS (mp) -21ESD(g Is)/E191D(:t) A ACCESSION NR: AT4048697 S/0000/64/000/000/0079/0085 AUTHOR: -Volkensh!M, N. V.; Fedorov, G. V Galoshina, E. V.; Startsev, V. Ye. TITLE:. Temperature dependence of the electrical and galvanomagnetic properties of rare earth metals Voprosy* SOURCE: Vsesgy]gnM soveshchani-ve p2M~~yqT.redkiWi metallov Worii i primeneniya redkozemellny*kh metallov (Problems in the theory and. use of rare- earth metals); matorialy* soveshchanlya. Moscow, Izzd-vo Nauka, 1964, 79-85 TOPIC TAGS: rare -earth -metal, rare en-, th electrical property, rare earth galvano- ar magnetic property, rare ear magnetic prop~rty,-Hall-effeot, r e earth atomic structure ABSTRACT- The electrical resistance and Hall effect are excellent indicators of the characterishes of the electronic structure of solid bodies. The present paper describes simultaneous measurements of the electrical resistance and the Ha-U effect for alarge group of hj&y purified/rare earth metals. The electrical resistance of neadymium, europium, gadolinium,fterbium, dysprosium, holmium, erbium and ytterbium was measured by a common potentiometer in -a metal cryostat at temperatures beturaen room and4.2K. The electrical resistance differed significantly from that of ULO usual metals with low -resistance, The temperature relationships could be used to divide the rare Card 1/3 MEMO L 155039-65 ACCESSION N_R: AT4048697 ru earth metals into four grcoups. The first group contains neodymium and ytterbium, which, do not show a.Unear relationship in the above-mentioned temperature intervale Ile second group includes dysprosium, holmium and erbium, which show breaks in the curves, and low resistance maxima when passing from the paramagnetic into the anti-ferromagnet- ic condition. The third group contains gadoliniu and terbium, which show a sharp break when passing from the paramagnetic to the anti-ferromagnetic condition, with a linear relationship in the paramagnetic field. Europium has a special place aroong the rare earth metals. It shows a sharp drop in electrical resistance below the point of passage from the paramagnetic into the anti-ferromagnetic condition. The detailed behavior of europium requires further investigation. Analysis of the curves for all the rare metals shows that the specific electrical resistance at equivalent temperatures is higher than for metals in the first group of the periodic table. The Hall effect, was measured with a DC potentiometer in a cryostat for europium, holmium,, arbium and dysprosium,- the authors being the first to measure the Hall effect of europlum and holmitum. Tezrperature variations did not change the Hall effect. On the basis of these tests and publications by C. J. Kavan, S. Legvold and G. S. Anderson, k can be seen that all the rare earth metals may be divided into a "light"group (up to gadolinium) and a "heavy" group, in both of which the waductivity depends on the electronic bonding. The paper further describes ard 2/3 L 15039-65 ACCESSION NR: AT4048697 S. .the variations of the Hall, effect depending on the temperature, induction and other factor Scandium should be noted specifically. The, 99,86% pure scandium tested contained, 0. 04%. Cu, less than 0. 01% Mo, 0. 03% Fe, 0.016% N2, 0.034% 02, 0- 001% H2 and 0. 008% Cd which was distilled under a vacuum. The specific electrical resistance of scandium is very h-Agh and exceeds that of copper and calcium. The resistance drops. linearly with temperature to the temperature of liquid hellum.17paramagnetic'susceptibility was -also found by the Faraday method. This did not depend on the magnetic field, but rather on the temperature, decreasing as the temperature rose. In conclusion it is noted that the appearance of one electron in the 3d-shell alters the physical properties of scandium in comparison with the other metals. Orig. art. has: 7 figures. ASSOCIATION: None SUBMITTED: 13Jun64 ENCL: 00 SUB CODE- MM, EM NO REF SOV: 002 OTHER: 012 Card 3/3 VOLKFNSHTE~M, N.V.; STAI?rSEV, V. Ye. Characteristics of the temperature dependence o.,L" the electric resistance of gadolinium and y-tterbium at low temperatures. Zhur. eksp. i teor. fiz. 406 no.2:45557-459 F 164. (MI-U, 17:9) 1. Institut fiziki metallov AN SSSR. ~A' (C) _2�k2,7-65 EWT(mli/T/Evip(-t-)/Elip(b)./M(C) PU-4 1.7P ACCESSION NR: AP5002346 S/6126/641018/006/0888/0894 IfX Startsev, V. Ye., AUTHOR: Volkenshte;yn, N. V. Starostina_ L. S. i _Romanov, Ye. P. TITLE, Investigation of the temperature dependence of the electrical conductivity~ of molybdenum and,tungatten monocrystals Jn the low temperature -regions 7~ ISOURCE: Fizika metallov i metallovedeniye, v. 18, no. 6, 1964, - 3:98- 894 1 M'~ TOPIC TAGS- molybdenum, tungsten, monocry-stal, polycrystalline molybdeni;., e* tungsten, electrical conductivity, Debye characteristic tempera- polycrystallin ture AWRACT: The temperature dependence of the electrical resistance of high Puri- ty Molybdenum and tungsten monocrystals'and of polyerystalline:samples of -these The crystallogriap metals was measured in the 4. 2- 300 K temperature rangc hi in sing electron bomo iarygtals__wej-.e obtained b~ zone melmtg cte"fisItIc-De ye- er attiret'..'.'as-calculated for the hJe-at T 6e... cii a- ic_ ebye~-ex barA t curve -0-re temperature interval of.'10 100 P__ T.. favorably with the theoretical Blo'c d Wilson curves.-~', he4ff 6-,. Card 1/2