SCIENTIFIC ABSTRACT PROKOSHKIN, V. A. - PROKOVYEV, M. A.

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• Collection: Scientific Abstracts
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• Release Decision: RIF
• Original Classification: S
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• Document Creation Date: November 2, 2016
• Document Release Date: July 13, 2001
• Sequence Number: 15
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

FROKOSHKIN, Dmitriy Antonovich; VASILIYEVA, Yelena Valentinov-na;
SAMAR171, A.M., otv. red.
[Niobium alloys] Splavy niobiia. Moskvay Izd-vo "Nauka,"
1964. 330 P. (MIRA 17:4)
1. CiLlen-korres.nondent fill SSSR (for Samarin).

S/16 61/000/002/003/003
D224 YD301
AUTHORS., Sharipkulovp R-Sa and Prokosbkini V,A,
TITLE-. Mechanical and certain physico, fbemical properties of
chromium-manganese steel
PERIODICAL2 Akademiya nauk UzSSR. Seriya tekhnicheskikh nauk.
IzveBtiyaq no, 29 1961, 85 - 91
TEXT: The steels investigated contained less than 0.1 % C~ 16 com-
positions of chrome-manganese steel free from other alloy elements
were melted alongside the chromium-nickel steel X18H9T ',Khl8N~T).
The metal was forged into billets, 12 mm diameterg 14 x 14 mm ,
20 x 20 mm2, and it was also rolled into strip 45 x 5 mm2. Short-
term tests to fracture were carried out at temperatures of 20 and
6000 on KRD-3-type specimens after soaking for one hour at 11000
and quenching in water, followed by tempering at 7500 for 10 hours-
The influence of temperature and time Of soaking during tempering
of quenched specimens on the formation of the d-phase (in"Ermetal-
Card 1/3

S/16 61/000/002/003/003
Mechanical and certain physico- D224YD301
lic compound FeCr) was studied on steel X17 16 (Khl7Gl6) (16-74 %
Cr, 16.3 % Mn, 0.14 % Nig 0.29 % Sig 0.07 % C). The steels were
also subjected to corrosion testing. Such tests were carried out in
boiling 55 % nitric acids The specimens, 30 x 20 x 2,5 mm39 were
first quenched from 11000 in waters 7 steels were tested for 4 cy-
cles of 30 hours each, the remainder for 4 cycles of 25 hours each.,
It was found that a chromium-manganese steel having an austenilic
structure approaches in its mechanical properties the steel Khl8N9T
both at room temperature and at 6000, and in some cases is even
superior. A steel containing up to 13 % Or and up to 11 % Mn exhi-
bits a superior V~T;S- owing to its austenite-martensite-type struc-
ture, Steels having an austenitic-ferritic structure have mechani-
cal properties practically equivalent to those of steel Khl8N9T at
200 after quenching, Heating to 500-8500 causes formation of the
(Y-phase which results in a drastic decrease in mechanical proper-
ties of these steels. Chromium-manganese steels containing 13 and
17 % Cr and A and 15 % Mn, respectively, are closest with respect
to their resistance to nitric acid attack to steel Khl8N9T. There
Card 2/3

3/167/61/000/002/003/003
Mechanical and certain physico- D224/D301
are 4 figures, 4 tables, and 5 references: 4 Soviet-bloc and 1 non-
Soviet-bloc. The reference to the English-language publication
reads as follows: F.M~ Becket: Am, Iron and Steel. Inst., 173-194,
1930~
ASSOCIATION: Institut metallurgii AN SSSRq Gornyi otdel AN UzSSR
(Institute of Metallurgy AN SSSR, Department of Min-
ing AN UzSSR)
SUBMITTED4 May 16; 1960
Card 3/3

m

maW physics 2149-wsons
1/1. Pub, 2.2 21,~*60
I Tyapkin, A. A.; lCozodaev. M. S..-.and Prokoshkin, Yu. D.

Titie 11 Formation of-TPO-mesons with protons of 670 Mov of energy-at the
nuclei of various elements
Dok. AN SSSR' 100/4. 689-692, Feb 1, 1955
.Absiwaot Experiments with.the foxuation of n* -Moone through a protoa collision
with another proton are described.. The protons in the eiperiments had an
energy of 670 Mev. Formations of nO.-mescns were observed aa nuclei
of various elenents, neyn 1y: D, Li, Be, B, G, Al, C, Cd, Sa and Fb.
The experiments were conducted ;with the-accoleraton of the Institute
of Nuclear Problems of the Aced. of Soo., USSR. Five referencess
3 USA and 2 USM (1952-1954). Graphs.
Institution s Acad. of Soo., USSR,.Instituts of Nuclear ProblemB
Presented. byi, Academician L..A.-Artsimovich, Deeember'22. 1954

--SUBJ',rCT USSR / PHYSICS CARD 1 / 2 PA - 1784
AUTEOR PROKdKIN'JU.D.
-TITLE The Relations between the Angular Distributions of Particles and
their Decay Products.
PERIODICAL Zurn.eksp.i teor.fis,ll,fasc-4,732-732 (1956)
Issued: 1 / 1957
In some cases no direct data are available concerning the character of the pro-
duction- and interaction processes of these particles because of their short
life. It is therefore necessary to content oneself with investigating the dis-
tribution of the secondary particles, i.e. of the decay of primary particles.
For this purpose it is, however, necessary to know how the distribution func-
tions of the primary and secondary particles are connected.
The present work investigates the practically important case in which the sec-
ondary particles move with the velocity of light and in which the angular dis-
tribution W(cos nc~ ,) of the primary particles does not depend on the azimuthal
angle T and can be represented by a linear combination of terms such as:
Wn- (1/2)(n+l)aosn rr with integral n. The distribution F (cos ~) of the
secondary particles is an analogous linear combination and is also explicitly
written down. With the help of these expressions it is possible to show that,
in case of any even (odd) n the angular distribution F is a polynomial
which consists of even (odd) powers of the cosine. A cnommon property of the
functions Fn is their rapid modification in the immediate vicinity of the

V
.-.,-Z'urji.eksp.i teor.fis,,31,fasc-4,732-732 (1956) CARD 2 / 2 PA - 1784
point P = 1. With diminishing P the anisotropy of angular distribution vanishes
rapidly. Only in the case of 0 , I are the angular distributions of the primary
and secondary particles similar to each other. The greater the power n the more
rapidly will anisotropy vanish. Even in the case of very high values of P is the
angular distribution of the secondary particles still nearly isotropic. A high
measuring accuracy is then necessary in order to be able to determine the angular
distribution of the primary particles. This applies e.g. in the case of investi-
gations of the angular distribution of neutral pions in the vicinity of their
production threshold.
Up to very high even values of the exponent n the radicals of the equation T
Fn(cos$~) 1/2 are within a small angular range of about,~14 - are cos (03).
A consequency of this peculiarity of the functions F n, which is of considerable
practical importance, consists in the fact that the yield of secondary particles
under the "isotropic" angle kl* depends only little on the velocity of the
primary particle. For n - 2 the yield does not depend on P at all. Therefore it
is possible to obtain data on the total production cross section of neutral
pions an the occasion of nucleon collisions. For this purpose it is necessary
that the P-quanta yield be measured only under one angle. The "isotropic"
properties of the angular distributions of secondary particles shown here make
it ponsiderably more easy to measure the energy dependence of the total cross
sections.
INSTITUTIO11: Institute for Huclear Problems of the Academy of Science in the
USSR.

PROKOSqxv, Yu.13.-
"Investigation of Neutral Pion Production bY 390-W Mev Nucleons
(Review), paper presented at CERN Symposium, 1956, appearing in Nuclear
Instruments, No. 1, pp. 21-30, 1957

X
AUTHOR: Prokoshkin, Yu. D. and Tentyukova, G. N. 120-2-4/3?
TIME: Investigation of the energy spectrum of protons of the
internal beam of a phasotron. (Issledovaniye
Energeticheskogo Spektra Protonov Vnutrennego Puchka
Fazotrona.)
PBRIODICAL: Pribory i Tekhnika -Eksperimenta, 1957, No.2,
pp. 18 - 22 (USSR).
ABSTRACT: The amplitude of radial oscillations in cyclo- and
phasotrons is considerable and the internal beams are
therefore not monoenergetic. The mean ener&7 spread for
particles at the inner target of the phasotron may be of
the order of tens of Mev and the theoretical evaluation
of the particle energy spread can be obtained in a very
rough approximation only. In experiments which use the
internal beam, the accuracy is very low, oiiing to the
absence of any date on the spectrum of bombarding
particles. At energies at which the cross-sections for
reactions chanT very rapidly (meson formation near the
threshold etc. measurements become impracticable if the
energy spectrum is not known. A method Is therefore,
needed which permits experimental determination of the
energy spectrum of the internal beam. Such a method has
Card 1/5 been su,:,- sted by Prokoshkin (Ref. 1) and is discussed
1-ge

120-2-4/3
Investigation of the energy spectrum of protons of the internaK
beam of a Dhasotron.
in the present article. The experimental arrangement
permittin- the measurement of energy particle distribu-
tion is shown schematically in Figure 1. It consists of
a system of equally spaced vertical metal wires in the
plane perpendicular to the direction of the beam. The
beam particles, when accelerated, are displaced towards
the target and energise the wires when passing through
them. The process goes on until the particles leave
the beam on reaching the target. The degree of activa-
tion of the v,-ires (which are made very thin so as not to
induce appreciable distortion in the beam) varies acco-,d-
ing to the distance from the target and depends on the
value of the free radial particle oscillations a
The activation of the wires induced by the protons,
assuming the active cross-section to be constant,
(Refs. 2, 31 4), is given by equation 3 where (p(xa,
is the distribution function of the number of collisions
of the particle with the wire for a given Cr, A-r is -,;he
mean increase of the radius per revolution, x is -the
distance between the given wire and the target. F(a) is
Card 2/5 the function chaiacterising the amplitude distribution

120-2-4/37
Investigation of the energy spectrum of protons of the internal
beam of a phasotron.
of free radial oscillations of the particles, a is
the amplitude of above oscillations. J(x) is the wire
activity induced by the protons. Further transformation
of the function F(a) into the energy spectrum F(6E ),
where E is the proton energy, presents no difficulPies
provideg the topography of the magnetic field of the
accelerator is known. The procedure of measurement of
the particle energy spectrum is thus reduced to the
experimental comparison of the activity induced in wirE!s
placed at various distances from the target, which is
possible if the function T(x,a,-Z-r) of equation 3 is
known. The collision distribution function is determined
starting with the equation for the radial movement of
the beam as given in equation 4, which can be reduced
to a dimensionless equation 5. In the case of a phasotron
(Z-r very large) it can be assumed that particle trajec-
tories are a family of trochoids. An expression is obtain-
ed for the collision distribution function (equation
Experiments were carried out at the phasotron of the
Joint Institute of Nuclear Research. (Obledinennyi
Card 3/5 Institut Yadernykh Issledovanniy). The proton enerFy

120-2-4/37
Investigation of the energy spectrum of protons of the internal
beam of a phasotron.
at the target was chosen to be 400, 550 and '050 IY:eV.
The distance of the wire system from the centre of the
accelerator was varied. The activ-ity of the threads T,,ias
measured, in standard geometry, by means of a group of
proportional counters. The values for J(x) were found
to be constant for the three values of protons energy
(within the experimental error of 3%). A plot of J'(x)
vs. x is given in figure 5. The conditions for the
validity of equation 3 are discu.,.sed, and the effect of
the wire diameter and of the material on experimental
results is also investigated. It is shown to be neglig-
ible. Finally, from equations 4 - 7 and from the obtain.~!d
data on the activation J(x), the energy distribution and
the distribution of amplitudes of the free radial vibra-
t1ions of the particles are evaluated for the internal
proton beam and are plotted in f-igure ? for the follo;,;ln6
values of parameters:
ZY = 2 x 10-3 12 = 0.05 .1
(n is the mean number of collisions of particles having
Card 4/5 amplitude a). The mean proton energy spread obtained was

120-2-4/37
Investigation of the energy spectrum of protons of the internal
beam of a phasotron.
Z Ul- = (12 + 3)1,;!eV. A diagram of the experimental arrann-e-
meRt and six graphs of theoretical and experimental
results are given. The work has been discussed .vith
V. I. Danilov, V. I. Kol1g, and A. A. 11yapkin. There
are 4 references, 2 of which aie Slavic.
SUBMITUE'D: October, 27, 1956.
ASSOCIATION: Joint Institute of Nuclear Research. (Ob"yedinennyy
Institut 'fadernykh Issledovaniy).
AVAIIABLE: Library of Congress.
Card 5/5

A.UTHOR EROKO~KIN, JU.D., TJAPKIN, It, 4. PA - 2086
TITLE :nvestigation of the Excit~tion Functions for the Reactions C-14(p,pn)C-1-1,
tl 2( (P,3pn)Na ", and ~U27(P,3p 3n)Na" in the 150 - 66c) -~%;11 Energy Range
(Issledov~~ie funkcij vozbUz`danija d1ja reakcij r,,l27(p,'1pn)-
Na
44 1 Al (P,3p 3n)Na" v intervale energij 150 - 660'MeV).
PERIODICAL Zhurnal Eksperimentallnoi i Teoret. Fiziki, 1957, Vol 32, Nr 1, Pp 177 -
178 (U.S.S.R.)
Received 3/1957 Reviewed 4/1,0517
ABSTRACT The excitation function for the reaction C"(p'pn)C11 (1) was measured by
R.AAMONT et al., Phys.Rev.88, 799 (1952), in the energy range from the
threshold value to 340 MOV-.Comparison of these results with those of L.
M.S.SOROKO and B.V.GAVRILOVSKIJ (report of the Institute for Nuclear
Problems 1952) indicated a rapid decrease of the cross sections in the 300
to 460 MeV energy range. But according to the measurements of the ratio of
cross sections in the case of 290 - 660 MeV energies the cross section of
the reaction (1) diminishes much more slowly in this energy intervalt
d(670)/d(290) = 0,84 t 0,03. The authors concluded from this that the real
reason for this non-agreement is obviously a systematic error (- 150/o)
committed on the occasion of the determination of the absolute cross section
in the above mentioned previous works. Results of more recent works show
better agreement. The cross sections found in the aforementioned previous
works are obviously too high by 15 to 250/o. Because of these unclear-
nesses the authors investigated reaction (].) in the 150 - 660 MeV energy
interval. For this purpose a graphite target was installed in the chamber
Card 1/3

PA - 2086,
Investigation of the Excitation Functions for the Reactions C231 (p,pn)C",
A,27(P,3pn)Na 34, and A,27(P,3p 3n)Na" in the 150-660 JMeV Energy Range.
of the accelerator of the laboratory for nuclear problems. ~-..roz-n `1-~,Y
passing through the target was determined by means of a gaurv ti,e-vio.
battery. By means of a group of proportionality counters th,-;; rkl
acti-,rity of graphite targets was measured and a value of 20,8 t G,2 minu-
tes was obtained for their half life. The following energir dependence of
the cross section of reaction (1) was found (Ep - energy of the protons
in the MeV,, d = 6 (E,,)/ cr (660) - relative cro3s section of the reaction).
dli(Cli) 11?49 + 0,06 1, 23 1, 19 1,16 1,03 0,98 1,00
In the case of E 260 to 660 MeV errors of I are omitted for space saving
purposes. These L:ta are also illustrated in a diagram. The data found by
the authors agree with other more recent data.
By me,tns of the above method also excitation functions for the reactions
A127(POPOMa" (2) and A.127(P,3p 3n)Naa'3 (3) are determined. They are
given in a table. The ratio between the cross sections of reactions (1)
and (2) decreases monotonously with increasing energy. This is contra-
dictory to the result found by G.CHACKETT, K.CHACr--;T'r et al. according
to which this ratio of cross sections decreases rapidly in the 200-500 MeV
energy range. This is indicative (in contrast to the dat,.-,. of the present
work) of the existence of a maximum of the cross section'-of reaction (2).
Card 2/3

FA - 2086
Investigation of the Excitatici ~Yanctions-for the Reactions Cla(p,pn)C",
A,27(P,3pn)Na", and A127(P,3p 3n)"la?A in-the 150-660 MeV Energy Range.
ASSOCIATION United Institute for Nuclear Research.
PRESENTED Br
SUBMITTED
AVAIIABLE Library of Congress
Card 313

-USSR/Nuclear Physics Elementary Particles. C-3
Abs Jour : Referat Zhur - Fizika, No 1, 1958, 358
Author : ProkQshki Y11 g Tyapkin, A.A.
-,D
Inst : Joint Institute for Nuclear Research.
Title : Formation of -,-io Mesons in pp and pn Collisions in the
Energy Range 390 -- 660 Mev.
Orig Pub : Zh. eksperim. i teor. fiziki, 1957, 32, No 4, 750-766
Abstract - Measurements vere made of the total cross sections and
angular distributions for the reactions of the formation
of -a-0-mesons in pp and pn collisions at various proton
energies. The values of the total cross sections at 660
Mev vere found to be 0"1r" -0.6 ::fO.2) millibarns,
arid 6`-1-1" (7-0-f 1.1)pp milibarns. In the 390 -- 660
gn
Mev ;n rgy range, 0the total cross section of the reac-
tion p -V p 7,- -r p -rp is proportional to the
Card 1/2

- -1 USSR/Nuclear Physics - Elementary Particles. C-3
J Abs Jour : Ref Zhur - Fizika, No 1, 1958, 358
maxi4u~a momentum of the 0-1 0 meson, raised to the 5-5
power. The angular distribution of the 170 mesons,
which is essentially anisotropic at proton energies
of 450 Mev, becomes isotropic as the energy increases
to 66o mev.
Card 2/2

05434
SOV/120-5~--7-5/46
AUT14ORS: -Prokoshkin, Yu, D., and Tl&ng Hsiao-vf-i
TITLE; Measurement of the 'L4;11erK.Y of Electrons and Gamma -~tii-kllt:j
With a low Efficiency Counter (Izmereniye energii
elektronov i gamma-kvantov schetchikom s maloy
effektivnostlyu)
PERIODICAL: Pribory i tekhnika eksperimenta, 1959, Nr 5.
PP 32-34 (USSR)
ABSTRACT: Measurement of electron energies between 50 mev and a
few Gev is very difficult and involves the use of large
magnets and "tot4l absorption" counters (Ref 1). The
problem is even more difficult in the case of gamma rays,
The instruments usually used are spectrometers which
determine the energy distribution,, However, it is
often unnecessary to have this detua- -led knowledge of
the energy spectrum and it is sufficient to have the
mean energy,, This is particularly useful when the fo.7m
of the spectrum is known, The mean ener.;y can be siiapl,-
determined by the method now sugges-,ed. Tne passage of
electrons and gamma rays through matter is accompanied
by the production of showers,, The cascade parameters
Card 1/4 describing these showers are uniquely connected faith t'ne

SOV/120 05~~,
-5)-3-5/46
Measurement of the Energy of Electrons and Gamtna qua-nta '.7-ith -3
Low Efficiency Counter
energy of the primary particle incident on the- abBor1,,-:._r,,
It follows that the primary energy way be determined if
one of the cascade curve parameters is measured, 1, Vt., e i I
the incident energy is r-,reater than about 1 Gev the
0
cascade curves can be computed in the usual way,
as in Ref 3. while for lower energ ies one can use-
experimental data (Ref 4) or the Monte Carlo calculations
due to Wilson (Ref 5), Fig 2 shows the number of
electrons in a shower as a function of the primiary
electron energy for different depths in the absorber.,
As can be been, there is a value of this depth t for
which this dependence is linear -to a high degree of
accuracy. This imeans the primary eiiergy may be determined
by measuring the number of electrons in the sho~cer ar,
only one point, The requirement of linearity is
introduced so that the mean energy can be directly
calculated even in the case of a wice energy spectru::,..
The quantity nt for various energies was measured by
the appara I -ii L - -
Card' 21LL tus S-own schematically i Fig 3, A coll4m-t-,ed

05434
SOV/120-59-3-5/46
Measurement of' the Energy of Electrons and Gamma 14uanta 71ith a
low Efficiency Counter
beam of high energy --amwa rays is incid,,,~nt on a I ii=
thick lead converter,, The positrons fo-L-ined in the
converter are deflected by a ma,-netic field throu-h
and pass through a counter telescope a, a Iead
collimator, and a counter arrayf,. By changini~ the
intensity of the mat-;-netic field, the enerGy of the
positrons could be varied between 50 and 500 Iilev, The
energy spread was 2 - 3%. The counter array 6 which was
15 x 15 cm in size, was made up of identical halogen
counters, When the particle passes through the telescope
a, a high voltage pulse is produced and is applied to
the cathode of the counter array., A lead absorber',
having a 'thickness giving the linear curve mentioned
above, is placed between the counters and the telescope
and the counting rate is determined with and without
this absorber, The ratio of the two counts gives the
quantity rLto directly,, The apparatus used in the case
of gamma rays is shown in Fig 4.. Here a thin (2 mm)
lead converter is placed in front of the telescope a,
Card 3/4 Another counter, in anticoincidence with the telescaDe,

05434
iD'O V 1 2u, - 5 9- 5/1' 6
Measurement of the Energy of Electrons and Gammia quanta Witii a.
low Efficiency Counter
is placed in front of the converter., The quantity nt,
is determined as above, ie by countiD,,-, with and
without the absorber,, The difference between the z;wo
arrangements lies in 'the fact that in the absence of
the absorber m electrons Droduced in the converter pass
through the colunter array., and not just one,, Fi,-, 5 shows
that the dependence of nt on the gamma ray energy is
quite linear in a wide ener-gy ran-e,, There are 5 fi:-,u:r,es,
~1- C)
2 tables and 8 references, 4 of which are Soviet. I
Chinese and 3 English.,
ASSOCIATION~ Ob"Yedinennyy Institut yadernykh issledovaniy
('r.i.-t
Institute for Nuclear Studies)
SUBMITTED: March 28. 1958
Card 414

21(9) SOV/89-7-41-4/29
AUTHORS: Vasilevskiy, I. M.,
TITLE: Investigation of the Energy Characteristics of the Deflectei
Proton Beam of the 6 Meter Synchro-cyclotron
PERIODICAL: Atomnaya energiya, 1959, Vol 7, Nr 3, pp 225-230 (USSR),
ABSTRACT: The proton beam (150-0670 Mev) coming from the 6-meter aynchrc-
cyclotron of the Ob"yedinennyy institut yadernykh issledovaniy
(Joint Institute of Nuclear Research) is collimated by brass.
diaphragms (width 0.1 to 0-7 cm; height 2 cm.). In this vay --'t
arrives between the poles (100 cm) of a magnet (field strength
16 koe), where it may be deflected up to 200. At the ou-.1.et of
the spectrometer there is a plastic scintillator as proton de-
tector, which is coupled with a multiplier FEU-19M. The eleutric
pulses of the multiplier are integrated by an RC-chain, and
the current is measured by the self-recording potentiometer
EPPV-51. By means of a synchronous motor the detector may Ite
moved perpendicular to the proton flux. The variation of zo-
ordinates could be reconstructed with an accuracy of up to
0.02 cm. The dependence of proton flux strength upon the
Card 1/3 variation of coordinates J(,Y,) is represented graphicaliy and

SOV/89-7-3--4/29
Investigation of the Energy Characteristics of the Deflected Proton Beam of
the 6 Meter Synchro-cyclotron
shows that here a Gaussian distribution exists. The ene.-gy
spectrum of the protons ~(E) was obtained by datermining ~J~Jjl
once with and once without the magnet being conne,.-ted, End 'by
being L'_' to determine the course of the energy spectr-am b~,
means ~egration. The deflected proton beam may *roe -e
presei metrically as well as by the Gaussian func-.icn
)(E) exp E2 )/2 a2~
~ _(F
E
where th %ersion 6 E at 665 Mev amounts to (2.81-0.3)lfev
(measuremc , with helium). The dispersions determ"ned
other R-values coincide well with the theoretical cur-,e g_-.en
in reference 4. The average energy of the protons was de-
termined with an accuracy of 0.1~6 by the method described in
reference 5 (current-carrying wire)s thIs accuracy 'os-ing at~a'~r,
able only in the case of energy measurements (E > 250 The
radiation energies are not constant quantities, but they
fluctuate in dependence on the various conditions of accelera=n
as well as on the conditions for beam deflection. !- was pos-
Card 2/3 sible to show by means of measurements carried out betweEn

so-1/801-7'-3-4/29
Investigation of the Energy Charact-erist"ics of the Deflected P.roton 3eam
the 6 Meter Synchro-cyclotron
July 59 1957 and October 12, 1958 that the fluctuations e.g.
for f= 665 Mev vary between 671.0 + 1.5 Mev and 658,8
By employing the method described a7lso the average energies cif
d and a-particles were determined which were accelerated in the
synchro-cyclotron. At a deuteron energy of 405.3 1. 0.5 ME:;r
the dispersion amounts to 1.7 � 0.5 Mev, whereas Tn the cabe
of a-partioles of an energy of 811.3 + 1.0 Mev it is
3.5 � 1.5 Mev. Results obtained.were Tiscussed with Tan Sya-.~-
vey and A. A. Tyapkin. There are 6 figures and 5 references,
2 of which are Soviet.
SUBMITTED: December 7, 1958
Card 3/3

24(5)
AUTHORS: Prokoshkin, Yu. D. , T',~il~, MV/56 79
M - , , - 1
TITLE: Showers Produced by Positrons 71ith Energies of 100 to 400
(Livni, obrazovannyye pozitronami s energiyey ot 100 do
400 MeV)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1959,
Vol 36, Nr 1, pp 10-16 (USSR)
ABSTRACT: In the introduction some theoretical and experimental works
dealing with this subject are discussed, as e.z. those by
Skobelltsyn (Ref 1), Belealkiy and. Ivanenko (Ref 3). The
authors of this paper used a monoenergetic positron beam
for their investigations. A high-energy e -beam (originating
from 7io-decay) impinged, coming from the phasotron of the
Ob"yedinennyy institut yadernykh issledovaniy (United Insti-
tute for Nuclear Research), upon a lead converter located
in the magnetic field. The positrons produced in the con-
verter were collimated by means of telescope counters and a
lead diaphragm. By varying of the magnetic field strength
positron energy was coutrolled within the range of
50 to 500 MeV with an accuracy of 2-3 %. This positron..beam
Card 1/3 impinged upon the 20.20 cm2 lead- or copper absorber with

~~C)'J/5 6-36-i -2/62
Showers Produced by Positrons With -Energies of
100 to 400 MeV
different thickness t. The shower electrons n(t) therein
formed are counted in the "cover" (kover) located at the
back of the absorber. The cover consists of a number of
STS-8 type counters of similar construction and has a size
of 15.15 cm2. A scheme of this device is given (Fig 1). The
cascade curves are plotted for the following positron ener-
gies: 101+2 MeV, 294+10 MeV, and 407+10 ?AeV. For these values
the proba~b`ilities w(-n) in ~,- of 8 i --values are between
0 and 30, 0 and 35, and in the last case for 10 t - values
between 0 and 50 rim Jead, and are given together in a table.
Figure 3 shows the cascade curves n(t) for the first two
energy values according, to measurements carried out by the
authors, and, for purposes of comparison, the curve cEil-
culated by 'Nilson (Villson)(Ref 5) according to the Monte-
-Carlo method. Good agreement was found. The conversion of
Wilson's radiation units (in which the absorber thickness is
given) in g/cM2 is carried out accordin.- to the equation
2 / 2
1 r.u. Pb = 5.6+0.2 g/cIn and for cropper 1 r.u- Gu = 11,5 P~ rm.
For positron energies of 407+!0 MeV figure 4 shows the cas-
Card 2/3 cade curve n(,) for lead- and copper absorbers; again

Showers Produced by Positrons With Energies of SOV/561-174-1-2/j52
100 to 400 MeV
mea:jured values are compared with those cnIculated by
Wilson. Agreement is good. From the measuring results ob-
tained the following approximated cascade curves are cal-
culated (see figure 5); they too are compared with 71ilson's
rosults. For the connection betweenparticle number atvl en Tr-
gy it holds for the maximum that n max (E O)r - 3(0(/e)0
0.008 E0 and tmax (E0 8k = O~ (see figure 6). There are
figures, 1 table, and 10 references, 4 of which are Soviet.
ASSOCIATION: ObI''yedinennyyinstitut yadernykh issledovaniy (United Institute
for Nuclear Research)
SUB'MITTED: April 23, 1958
Card 3/3

21M BOV/56-36-6-6/66
AUTHORSt Dunaytsev, A. F., Z,~~kos~kln, Yu. D.
TITLE: The Reartion. p + p --~ p + p + n0 Within the Energy Range From
the Threshold to 665 Mev (Reaktsiya p + p -4 p + p + no v ob-
lasti energiy ot poroga do 665 MeV)
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, 1959,
vol 36, Nr 6, pp 1656 - 1671 (USSR)
ABSTRACT: The present paper investigates the angular distribution of
neutral pions formed in proton-proton collisions within the
range of 400-665 Mev. The paper goes into many details and first
discusses the results mentioned in numerous publications dealing
with this subject, and deals with the problems connected with
the investigations described. Pion angular distribution is de-
termined by means of the angular distribution ofy -quanta
(decay nO -+ 2~); the latter is less anisotropic than the an-
gular distribu ion of pions, and with decreasing pion velocity
the anisotropy vanishes rapidly (exponential decrease, see
figure 1). The investigations were carried out with an unpolari-
zed proton beam on the six-meter phasotron of the OIYal. The
Card 1/4 experimental arrangement is shown by figure 21 proton energy

The Reaction p + p -4 p + p + n 0Within the Energy SOV/506-36-6-6/66
Range From the Threshold to 665 Mev
distribution in the beam corresponded to a Gaussian curve with
a dispersion equal to (2.8+0.3)Mev at maximum proton energy
(of Fig 3). In the followi7ng, the authors describe the recording
apparatus in detail. Figure 4 shows a scheme of the X-telescope
system, the degree of efficiency of which is shown by figure
5 in dependence on the angle. Liquid hydrogen in a cylindrical
container made from foam polystyrene as well as polyethylene
and graphite (for cross section measurement) (diameter 8 em,
length 25 cm) was used as a target6 The most favorable recording
conditions were in the range of 45 n + e , V )/W( + -4
is shown in Fig. 1, Experiments are made with positive pions. The
greatest difficulty is the charge exchange of the pions on entering the
scintillating material of counter 4. The probability of charge exchange,
however, decreases rapidly with energy but its intensity is still higher
thanthat of the sought 4-decay by almost three orders of magnitude. One
count was recorded during an operating time of about 30 hrs which corre-
sponds to a X of about 5*10- 8, But this one count could belong to a
#-decay as well as to a charge exchange process. Estimates showed that
X < 7-10- 8~ Calculation of the constant G, which determines the intensity
of A-decay of pions, yielded G -< 2.5G A I Consequently G is essentially
not greater than the constant of vector interaction Gis = 1,4'10- 49 erg - cm3
14 14*
as determined from the decay 0 -4 N D, I~ Blokhintsev,
V. N. Sergiyenko, V. P. Dzhelepov, A. A. Tyapkin, A. A, Log-unov,
Card 2

S/056/62/042/002/049/055
,rExperimen-al estimate of .5 -decay ...
BlOB/B138
Ya. B. Zelldovich, S. S. Gershteyn, B. Pontekorvo, and L. I. Lapidus are
thanked for help and discussions. There are 3 figures and 8 references:
4 Sovidt and 4 non-Soviet. The4references to Engl ish- language publica-
tions read as followst H. L, Andereon et al. Phys. Rev., 119, 2050, ig6o;
R. P. Feynman, M. Gell-Mann, Phyg. Rev., 102, 193, 1958; E. C. G. Sudarshan,
R. E. Marshak, Proc, of Padua cont.0 19571 G. Impeduglia et al.. Phys, Rev.
Lett., 1, 249, 1958.
ASSOCIATION: Obl'yedinennyy In�tit4t yadern kh i88ledovaniy.(Joint
Institute of 1fu61~&r,_Reoearch~
SUBMITTED: Docember 9, 1961
Legend to Fig. 1: M - magnotia foouaing lensi 1, 2 - scintillation
counters of n meson monitor (with PY-33 (FEU-33) photomultipliers),
3 - scintillation counter (with 56 AVP photomultiplier), 4 - "at ping
P I.
detector" counter (FE-U-33); 5, 6 - Cerenkov spectrometer (58 AM
CH - polyethylene filter for slowing down pion beam; Pb - lead shield.
2
Card 34

37P96
S/05 62/042/005/048/050
B I 08Y31 38
;JUTHORS: Dunayt.-ev, A. F., Petrukhin, V. I., Prokoshkin, Yu. D.,
Rykalin, V. I.
TITLE: The probability of z + -.4n0 + e + + V and r, + + e+ + v decays
PE'RIODICAL: Z-hurnal eksperimentallnoy i teoreticheskoy fiziki, v. 42,
no. 5, 19062, 1421-1424
Z'a--11-er .,.,crk (ZhETIT, 42, 652, 19062; Nuovo Cim., 22, 5, 1962) showed
as predicted by 'theory, the relative beta decay probability of the
r mezor. is indeed very small (, 10 This paper presents more results
or the radiative beta decay as observed by a system of scintillation
counters and moderation filters. The meson beam varies with time at a
period of 76-10-9 Sec. The data obtained are in agreement with theory and
confirm ihe as3umption of the conservation of the vectorial current. Exact
measurements yielded the relative beta decay probability +1.0 )-10- a
-0-5
and the constant of the beta decay intensity G = (1-14 1 0-37)G 0where
Card 1/2

The probability of- 3108Y3138
1.'fO-10- 49 erg-CM3 is the vectorial constant of nuclear beta decay
P. reynman, 11. Gell-'.-:Fnr,. Phys. Re
v., 109, 193, 1956). There are
3 fiE;Ures.
%r--OC-'r1ION: 01~11yedixnennyy 4nstitut yad r I h i ledovaniy (Joint
e n ic as
institute of Nuclear aesearch~
SUB."'ITTED: AMarch 131, 1962 (initially)
APril 13, 1962 (after revision)
S/05 62/042/005/048/050
Card 2/2

S/056 62/042/r,06/044/047
B11
B1 04Y13 2
AUTHICRS: Dunaytsev, A. F., Petrukhin, V. I., Prokoshkin, Yu. D.,
Rykalin, V. I.
TITLE: Evidence of the charge exchange of stopped n mesons on
nuclai of bound hydrogen
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, v. 42,
no. 6, 1962, 16ao-16 82
TEXT: The charge exchange of n mesons stopped in polyethylene was
_nvestigated using a device with high time resolution.(A. F. Dunaytsev
I
et al., ZhETF, 42, 632, 1962). The device allowed ;0 mesons to be
recorded more efficiently than had been possible in previous investiga-
tions. A 75-Mev n- meson beam (Fig.) passes through a set of scintilla-
tion counters and moderating filters and is stopped in a target (poly-
ethylene, liquid hydrogen). The y-quanta produced during the decay of
no mesons emitted by the stop of n- mesons are recorded by Cherenkov
spectrometers. After preliminary experiments with a target of liquid
hydrogen the H target was replaced by a polyethylene target. The
Card 1

S/05 62/042/006/044/047
Evidence of the charge exchange ... B104YB112
coincidence counting rate remained two orders of magnitude above the
background level. 71hen the target was taken out of the beam, the count
rate dropped to 1/300. The y-quanta recorded possessed an energy of
70 Mev. In both spectrometers, the y-quanta were produced simultaneously.
The effect observed was caused by the stop of n- mesons. ','then the energy
of the n- mesons was reduced to 65 Mev, the count rate dropped to 1/15.
It'lith the use of a graphite target, the count rate reached only 1/50 of
that obtained with a polpthylene target. There is 1 figure.
ASSOCIATIOU: Ob"yedinennyy institut yadernykh i'saledovaniy (Joint
Institute of Nuclear Research)
SUBL-1-ITTED: April 4, 1969.
Fig. Experimental arrangembn t. (0-0) scintillation counters,
(5)-(6) Cherenkov spectrome6is; (7) scintillation counter in anti-
coincidence connectionj (8)~'~b~using magnetic lens; (9 polyethylene
filteribr the moderation of "- iesons; (M) target;
n ta Pb lead shield.
C~Lrd 21e

3/056/62/04 3/004/ 013/061
B102/B180
L,"; .An, 1-okoshkin, Yu. D.
t
rnri1lar dintributions of pions produced in nucleon collisions,
-raid the h:,-pothc-;is,of isotopic invariance
c-*~-.pe T-imien tall noy i teovetiches'Loy fi.ziki,.v. 43,
no. 4(1:j'), VIi62, 1202 -.1207 . //
'_]~:0-',,ev neutron bean, from the ~)roton synchrotron of the
L: i bo r:~ 1. r -'
Iya yarlornykh problen, UlYal (Laboratory of Nuclear Problems of the
Glyal) wa,..; used to obtain exact data on the pion'angu~ar distribution of
I
- n+_P
n+p-~-j + -eactions. It Was obtained 'tty r6cording the pion -decay
-ran, 0
in a telescope ai gement of scirtillati'n and Cerenkov
counter.-: with a lead co.,-.verter. The Lyamma-quantum yield from np-collisions
ultsted by the difference method from neutron-irradiated polyethyl-
ca1c
ene and Graphite: ey' - (dqt 'dQ)/(dO~C/d_Q)_' The angular di.-3tribu-
np(Q) np/ n 0
tion fr (tf) was in fnct oymmetrical with respect to 90 c.m.s. as required
I0.
C a r d 1

-6/056/62/043/054/ 013/061
,.tribulions of . . .
L 61 02/B1 80
b-! co-servrt~icn. It can lie desn-ribed by fl- W -1/3
nD
+ :",Cc)z if t~ic- dian enerCy ---L-)ectru:,, i L
s ta'ten into aCCOUnt,
2
-37)cos -P. ior averare neutral-pion anEular dis-
+ (o-~,+ - -
e
trib~i ti n~; I + ( 0 . c o:; This ticvoeri with the fk- r~p)
+ n
d i s t r r. o b. ta n e dby ~-'epanov ani -.-,-,,chenko (ZhETF, 32, 1265, 1957) anl
Dy Ot al. (Z,-I-,'TF--, 35, 64, 1)58), but not -.,.-ith those obtained
by rondro. (Phys. -lev. 114, 1623, 1959) or Rosenfeld (Phys. Rev. 96, 13),
1~1`54) -tt :1,1bout 650 lViev. This could be due to violation of the isotopic
invariance at hitah Tl,oro are 5 figures and 1 tnble.
A~;z-GCIA-1,--'. -Obllyudinennyy iristitut yadernykh issledovaniy (Joint
Institute of Nuclear Rese3rch)
6'-)

PETRUKIIIN., V.I.; PROKOSHKIN, Yu.D.; ZROLOVA, N.N., tokhii.red.
[Charge exchange of stopped --l-/--r--esons on complex
nuclei) 0 perezariadke ostanovivshikhsia JT --mezonov na
slozhnykh iadrakh. Dubna, OblledirenrWi in-t iadernykh
issledovanii, 1963. 5 P. (MIRA 17:1)

S/12o/63/ooo/oo.1/043/072
O'WE"314
AUTI-10, U
RS Dunayt s ev, A. F. Petr Rhin, V-1. , Prokoswun, Yu.D.
and Rykalin, V. 1.
A detector. for ;;topp:Ln_r- mesons
TITLE:
PF-RIODICAL: Pribory i telchnilta eksperimenta, no. 1, l9tG5,
159 161
TUAT: The detector is illustrrt ad schematically in Pig. 1.
Bits Properties were investigated err'th a 75 NeV qT+-beam. The
11 '1 a scintillation counters of the beam-
IT II as ons pass througi tL
~:4atcnsity monitor (1, 2) and are then retarded by the polythene
-,filter 5 They come 't o reat in the phosphor of the last
c ount 63- (S The system incorporates fast: photomultipliers
~(56-AVP)- The mesons -are recorded by the fast coincidence circuit
-rhose resolution %,,-as somewhat
CI 4..higher than reported previouslyby
similar
Dunaitzev et al (Nual. Instrixa., 196c, 8, 11) who have s
'-us -Le the,optiml i iorkinr- conditions
apparat in order to, detannii Lir r
-ra s r -ording of stopping-
an assessment % iiade of the officicaicy of roe-
t
and transmitted-iY -raesons (in the Latter case the fil er was
removed) as a.function of the voltage V on each of the
C
rd 1/4
a
"MMIS-212"WO

Vi-o/63/ooo/ool/oWo72
A detector for 3 2 /1".3 1
Photoiaultipliers. Thus t1le amplitude discrimination ad
carri
nt or 5
out. not. only in the couA as.was done previouisly
but a!.-;o in the counter In t 11-4.s -,,~Iyl the volt in
age reZion
:%~:hich t h asensitivity of the de-Lector to transmitted mesons
decrea.
as rapidly vith decreasing V, waile the efficiency of
of stopping mesons was still very nearly 1C011', was det--
ermined. The moson-countins rato was than -fourid as a function
of tho delay :Z~t of the T)ulso -from counter ~ relzitive to
IL -or a number of values o'f V in the above ro-ion. Th a
c ount or
-~foria the resolution curv.e;:; -rras found-to be quite- different A-or
ztopping and transi-iiitting 11 -I1105ons. Hance, tile selection
fi( ensitive to the dela
coef iont-viras very s. L. y 4'1 t Fig. 3 shows the
selection coefficient K (2) and tl-.c efficiency of recording of
.5topyinm mesons e (1) as functions of the delay tiiao At . The
arrovr 1ndicates t1ho -value of the delay.
As can be seen,
a Selection coofficiena. of the order of 50 may be obtained with
an G.LA.Jiciency practically equal to- 1000,,,. This compares -with K
The detector is suitable for the
as reported-by Dunaitsev at al.
select--ron of. stopping particles -in tile presence of a large
Card

N
t~_
0
0
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f-I
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ITODOIC; $.- UOJIUI
CUOTOnOA: 7 nopomemian
10 i33M)"A At; Cz, Cil - Cxc&tGT 'COD"MeRlsit;
._4 171, '711 7 nepectionstio yoYposilrTua

ACCESSION NR: AP4009089 S/0056/63/045/006/1737/1742
4.
AUTHORS: Petrukhin, V. I.; Prokoshkin, Yu. D.
TITLE: Measurement of the mass difference of charged and neutral
pions
SOURCE: zhurnal eksper. i teoret. fiziki, v. 45, no. 6, 1963,
1737-1742
TOPIC TAGS: pion, charged pion, neutral pion, pion mass difference,
neutral pion decay, negative pion capture, capture by protons, pion
capture by protons, gamma ray angular correlation
ABSTRACT: In view of the importance of employing different methods
educin-
and' ^. - the experimental error, a method is developed for measur-
ing the pion mass.difference by determining the angular correlation
of the gamma rays from the decay of neutral pions produced upon cap-
ture of negative;p~ons by protons. The accuracy of this method is
Card lltz-

ACCESSION NR: 44009089
claimed to be alMQr?t as good.,as that obtained by Hillman et al (Nuo-
vo Cim. v. 14, 887, 1959) an~ Haddock et al (Phys. Rev. Lett. v. 3,
478, 1959). A value 4.59 + 9,03 MeV/c2 iak obtained for the pion
mass difference,xin good agreement with the results by others. The-
method is free of*rystematio errors associqted with the determina-
tion of the angular resolution and geometric dorrections. "In con-..
clusion, we take:-t'~ie opporturtity to thank X. F. Dunaytsev and V. I.
Ry*kalin for help with the work, I. V. Puzy*nin for performing the.
laborious comput.~4ons, andA. A. Tyapkin for a discussion of the
results." Orig. art. has: 5 figures, 7 formulas, and 1 table.
'ASSOCIATION: Ob"y~~dinenny*y:institut yaderny,*kh issledovaniy (joint
Institute of Nuclear Research)
SUBMITTED: OlJun63
.CODE: PH
S
Carrd
D4CE ACQs 02Teb64 ENCL: 01
N4 REF SOV:
091 OTHER: 0061

DUNAYTSEV, A.F.; PETRUKHIN, V.I.; PROKOSHKIN, Yu.D.; MALIN, V.I.
- -- . .....
Pion beta-decay. Zhur. eksp. i Ileor. fiz. 47 no.1;84-
91 J1 164. (MIPA -7:9,
1. Obl'yedinennyy institut yadernykh issledovanly.

L 26923-65 EWT(M) DIAAP
AMESSION NR: APS004193 S/00-70/65/160/001/0071/0072

AUTHORS: Petrukhin, V. I.; Prokosh kin, Yu. D.

TITLE: On Pi-Mesic toru processes in hydrogen-containing substances
SOURCE: AN SSSR. Doklady, v. 160, no. 1, 1965, 71-72
TOPIC TAGS: Dion, mesic atom, pion transfer, hydrogen containing
substance
ABSTRACT: The purpose of the investigation was to determine the
M-Itanism of the transfer of pions from 'hydrogen atoms to heavier

..............
or
/3'
L 2,693.23-63
ACCESSION NR.- APS004193
bv Cerenkov total-absorption spectrometers. Various gases and solu-
t)-(,-ns were used as the targets .- The results have shown that a prob&-
.--- -4 -inns bv nuclei of bound hydrogen does not de-

1
L 2(s
,I ACCINS-118m NR: . AP5004193
i
i SUBMITTED: 18Jul64
I
NR REF SOV: 002
I
i
i
ENCL: 00 SUB CODE: NP
OTHER: 001
0

DUNAYTSEV, A.F.; PROKOSHKIN, YU.D.
Multichannel schame of ocincideLces and antiaolnclden~-es wil"h
lo-w resolving time. Prib. IL takh, ekep. 9 no.5i93-99
164. (141RA 1?312,
1. Ob';yed-'nernyy inst-itut yadernykb. issiedovanly,

~IJTI-Ny v
':;-1. v red. Z!:ur. ekzper. ' te--Zet.
amn (M'Juel 19~----2`
1. Ob'yed'riennyy pt(',,r-:,rykjj ~vsled~vanly. oubvs-Itted
Fnpl,~nnber 1, 1,965.

GUHAVIN, V.M.; XLIGER, G.K.; KOLGANOV, V.Z.; LEBEDEV, A.V.; MARISH, K.S.;
IIJSIN, M.A.;.-PROXOSHKIN, Yu.D.; SMOLYANKIN, V.T.; SOKOLOV, A.P.;
SOROKO, L.M.; TSUTY VA-CPLIE [Tslji 'Wa-ch'i;ang]
Elastic scattering of 650 Mev. protons. Zhur. eksp. i teor. fiz.
47 no.4:1228-1231 0 164. (MIRA 18:1)
1. Obl'yedinennyy institut yadernykh issledovaniy.

PETR~ Yu.D.
rin Ti -mesic azcm prccesses in hyirogen-bear4n.- -UbSta CES. ~ok',
JP:2)
MI SSSR 1-00 no."IC/1-72 Ja T
Ob"Yedin,amyy ipstAUit y'adErnykfl i.,-3lf.-dCVtLniy. SUbMLULUN AUffLISt
1964,

0 Ij
G I - ~ I
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0. cto
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tota.).. a a%l -~c I es
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W�, 5~
P,
9J
:7 17' T.
I ACCESSION VR: A041047465 S/Olzo/64/000/005/0093/0099
I AUT14OR: Prokoshkin. Yu. D.
TITLE: Multichannel -coincidence and anticoincidence circuit with a short
resolution time
SOURCE: Pribary* i tekhnika eksperimenta, no. 5, 1964, 93-99
c
!'TOPIC TAGS; coincidence circuit, anticoincidence circuil, multichannel
coincidence circuit, multichannel anticoincidence circuit
ABSTRAGT:~ Basedlo.n an earliez double -coincidence circuit with a resolut..
~tirne of 10 nb*ed,~.th6 isolating
present circuit uses a bridge as an element for
both coincidence and anticoincidence and has a rosolution time of I nsec; the
bridge has n inputs (see Enclosure 1). The circuir ch.-aracterlstics measured by
a 70-141ov pi-meson beam are: the plateau, over'600 v; resolution for the
`6
narrowest curve, 0.8 nsec; haff-width of the zesoliertion curves, at 10
life,

ACCESSION NR: AP4033099 S/0120/64/000/002/0022/0023
AUTHOR: Petrukhin, V. L; Prokoshkin. Yu. D.; Soroko, V. M.
TITLE: Foam-polystyrene liquid-hydrogen target
SOURCE: Pribory* i tekhnika eksperimenta, no. 2, 1964, 22-23
TOPIC TAGS: nuclear target, liquid hydrogen target, foam polystyrene i
target
ABSTRACT: A new two-chamber foarn-polystyrene liquid -hydrogen -filled target
is~described (see Fig4 I of the -Enclosure)e The liquid hydrogen is
stored in a tank (3) surrounded by a liquid-nitrogen screen (5). The tank is con-
nectedwith the targets (1)and(2); one of them can be placed into a bearn of
particles. The targets and the tank are sitrrounded by foam-polystyrene Jackets
which are - cooled by- the . ambient . evaporating hydrogen. Mle 13-31ter
nitrogen jacketWis made from stainless steel. Provision is made for the r& d
pi
card 1/3

ACCESSION NR: AP4033099
removal of the hydrogen from the targets (1) and(U The hydrogen capacity is
33 liters; cooling nitrogen consumption is 6 lit/hr; time of hold of the hydrogen
(ortho plus para in 3:1 ratio) is 30 hro' "We t a k e t h i a opportunity to thank
V. Vlasov and V. N. Dmitriyevskay.%. for their help in preparing and testing the
target. 11 Orig. art. has: I figure.
ASSOCIATION: Obl'yedinenny*y institut yaderny*kh iseledovaniy (Joint Nuclear
Research Institute)
SUBMITTEb: ZlMay 63 DATE ACQ: I lMay64 ENCL: 0
SUB CODE: NP NO REF SOY: 000 OTHER: 002
!ATD PRF.SSi 3o43
Card Z13

ACCESSION NRs AP40]
Fig, 1. New design of. &.foam-polystyrene liquid-hydrogen target
Card 3/3

I . .
ACCESSION NR: AP4042373 S/0056/64/047/001/0084/0091
AUTHORS: Dunaytsev, A. F.; Petrukin, V. I.; Prokoshkin, Yu. D.;
Ry*kalin, V.'I.
TITLE: Pion beta decay
SOURCE: Zh. eksper. i teor. fiz., v. 47, no. 1, 1964, 84-91
TOPIC TAGS: pion, beta decay, Cerenkov counter, nucleon, positron
P.BSTRACT: Continuing earlier investigations (Intern. Conf. on Fun--~
amental Aspects of Weak Interactions, Brookhaven, USA, 1963) the
authors registered 43 cases of pion beta decay with the aid of
Cerenkov spectrometers. The relative probability of this decay
was found to be X = (1.1 + 0.2 x 10-8), which confirms the hypothe-
sis of vector current conservation. The installation used for the
measurement was described elsewhere (PTE, no. 1, 159, 1963) and con-
sisted of four Cerenkov total-absorption spectrometers. The experl.-

ACCESSION NR: AP4042373
ments were made with the synchrocyclotron of the laboratory of
nuclear problems OIYaI at the end of 1962. The experimental setup
described. Th4 measurements
and the adjustment of the apparatus are
10
lasted 500 hours and involved the passage of 4 x 10 pions. The
apparatusWas recalibraited by means of pulsed light.sources'every
two hours. The values obtained for th~lconstants G and'GI3, which
characterized the beta~decay of the pidh and the nubleon, were found
to be approximately the same, G = (1.03 + 0.11) G13, which is also
in agreement with the data obtained at CERN (P. Depommier et al.,
Phys. Lett. v. 5, 61,1963). The energy spectrum of the positrons i
produced in pion beta decay agrees with that calculated on the basis
of the vector-current conservation hypothesis. "In conclusion we
thank G. P. Zorin, V. I. Orekhov, A. V. Revenko, N. N. Khovanskiy,
V. A. Cherny*kh, L. N. Andrianova and her co-workers, N. B. Yedovina,
N. M. Kovalev, and K. A. Baycher and his co-workers for help in pro-
ducing the apparatus and with the investigation. We are grateful
to Kim Ge Fa, E.,V. Kyagu,'.Z. F. Prokoshkina, and M. Sgonova for
2/5.

ACCESSION NR: AP4042373
scanning and processing the photographs." Orig. art. has: 8
figures and 3 formulas.
ASSOCIATION: Ob"yedinenny*y institut yaderny*kh issledovaniy
(joint institute of Nuclear Research)
,ISUBMITTE!D: 14Feb64 ENCL: 02
SUB CODE: UP NR REF SOV: 008 OTHER: 010
3/5

'- \3
I Z3 4 5 =~~
humn '-'-
K
ENCLOSURES 01
Experimental setup. 1 6) scintillation counters, 7)Cerenkov total absorption
spectrcmeter's, 8) anticoincidence scintillation counters, K- decelerating filters
ACCESSION NRs AP4042373

ACCESSION NR:~e4042373 ENCLOSURE1 02
MI.)
positrms produced i picn
Energy spectrum c~f in
beta decay. kTow,- positim of positive M=
distributicn nk-Lximum
17S
2 d.
mev.
.Card 5/5

PROKSIKY Josef, inz.
Some problems of snsw-in- the product cual-fty ix: t:--,e jeneral
machine industry. I odn org- 16 no.11:4e3-49,5 AN 1 64.
1. Kinistry of General Machine Industry, Prague.

621.396.11,08 : 621.396.61
. A simple method of esUpating.Rjjw-.proj;jga:.-
A3
don within the Visual Mage-
Zkg, '216, 346-52 (Dec., 1953)
The elfcaive service area of an u.s.w. broadcasting
transmitter is determined by means of a relief map

Electrical Engineering Abstracts
'
of the part;cular district, taking account of the
'
curvature or
tho earth
s surfacc, A point sourc-c of
june 195h , light is mounted ovcr such a relief map at a height and
EIOCtriCRI Engineering location corresponding to those proposed for a
transmitting aerial. From photographs showing the
intensity of illumination of the district round the

~os!d transmitting site ood estimate can be
pLo
made of the effective service area. The tLic or the
method is illustrated by results obtained 'with a
relief map of the Harz Molintains district, transmitting
aerials at heights of 50 m and 200 m being assumed oil
th~ Torfhaus and on the Bocksberg and at a height of
100 m,ntar Braunschw-eig. The results ob~iai.ned are
discussed with reference to diffraction theory. The
horizontal scale of the relief map used was 1 3 100 000,-
the vertical scale being 1 5000. WIL;j%'o-4

RYABOVA, T.S.; GLEBOV, R.N.-, SHABAROVA, Z.A.; PROK-OV''IEV, M.A.
Synthesis of methy'. ether of N-adeny 5-phenylalanine b-i -h-a
carbodiimide method. Dokl. AN SSSR 15-11 no.2063-365 N 62.
(MIRA 16:12)
1. Moskovskiy gosudarstverinyy un-'verqLtet im. M.Lomonc-sova,
Predstavleno akademikom A.N.Belozerskim.