SCIENTIFIC ABSTRACT -

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• Collection: Scientific Abstracts
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• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
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• Sequence Number: 10
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

48-4-40/48
TITLE% Luminescence Duration of Color Centers in Ionic Crystals
(Dlitallnost' lyuminesteentsii tsentrov okrashivaniya .v
ionnykh kristallakh)
luminescent spectral orientation character determined by
means of polarization measurements, and duration of lumines-
cence4o The luminescence durations are also different in two
related types of luminescent color centers in C&F 2 crystals
~Iredll and "blue" centers).
Luminescence duration of color centers does not change prac-
tically at temperature decrease down to 900K and falls during
crystal heating. The 'r-decrease is caused by thermal quench-
ing and is not connected with the irreversible process of
thermal destruction of luminescent centers.
The measurement of V-values together with absorption spectra
make it possible to determine the concentration of color
centers and energies of their oscillators.
No References are cited.
INSTITUTIONt Not indicated
PRESENTED BYt
SUMUTTEDt No date indicated
AVAILABLE: At the Library of Congress,
Card 2/2

SUBJECT4 USSR/Luminescence
4,8-5-54/56
AUTHOR: Foofilov P.P.
............................................. . ... . .......................... . . .. ...
TITLEt Nature of Luminescence Centers in Artificial Fluorite Crystals,,
Activated by Rare Earths and Uranium (Priroda taentrov
lyuminesteentaii v krintallakh isku tv nnogo flyuorita# ak-
tivirovannykh redkimi zemlyami i ur:noomo)
PERIODICAL: Izvestiya Akademii Nauk SSSR, Seriya Fizicheskaya, 1957,
Vol 21, #5, pp 779-780 (USSR)
ABSTRACT: Investigation of luminescence spectra of rare-earth activators
in artificial fluorite single crystals (CaF 2) shows that every
rare earth -element can yield luminescence spectra of two sharp-
ly different types, depending on the conditions of crystal
formation. This difference is spectra can be connected with
the differen4in the structure of the next surrounding of a
rare earth ion (TR3+)t arising because of a difference in the
manner of compensation of the surplus positive charge.
In C&F2-TR crystalat formed in an oxidation atmosphere# the
local compensation of the surplus charge can be realized by
Card 1/3 the iaomorphic replacement of one of the fluorine ions in the

48-5-54/56
TITLEs Nature of Luminescence Centers in Artificial Fluorite Crystals
(Activated by Rare Earths and Uranium (Priroda teentrov
ly-uminesteentaii v kristallakh iskusstvennogo flyuorita ak-
tivirovannykh redkimi zemlyami i uranom)
next surrounding of the TR3+_ion by an oxygen ion.
In CaF2_TR arystals,formed under strongly reducing conditions,
the arising of electron-accepter centers is possible, which
hamper the arising of electronic luminescence centers at the
action of hard radiation.
When fluorite crystals with rare earths, capable of passing
over into bivalent state (samarium, europium ytterbium), are
formed under strongly reducing conditions, the arising in
the CaF2 crystalline lattice of bivalent TR24-iona is possible,
which is accompanied with characteristic luminescence and
absorption spectra.
In order to obtain luminescent centers in fluorite.--crystals
activated by uranium, a strong oxidation of crystals is neces-
saryl which makes it possible to compensate the surplus charge
by means of an isomorp'hic replacement of 4 fluorin
6+
the next surrounding of the uranium 13 -ion by-4 i2ono; 0'
Card 2/3

48-5--54/56
TITLE: Nature of Lumineacenee Centers in Artificial Fluorite Crystals
(Activated by Rare Earths and Uranium (Priroda taentrov
lyumineatsentaii v kristallakh iskusatvennogo flynorita,
aktivirovannykh redkimi zemlyami i uranom)
One Russian reference is cited.
INSTITUTIONt Not indicated
PRESENTED BY:
SUBMITTED: No date indicated
AVAILABLE: At the Library of Congress,
Card 3/3

L-0 V;
AUTHORSt Galkin, L. H., ~P_ 2 o -M-4-18/63
TITLE; The Luminescence of Trivalent Uranium (Lyuminesteentsiya
trekhvalentnogo urana)
PERIODICALs Doklady Akademii Nauk SSSR, 1957, Vol. 114, Nr 4, Pp. 745-747
(USSR)
IBSTRACT: First some previous papers dealing with this subject are re-
ferred~ to. When investigating artificial monocrystals of CaF2,
SrF2 and BAP2, which contain about 0,3% uranium and were bred un,
der strongly reduced (?) conditions, the authors discovered a
strong luminsmcenqo. The spectrum of this luminescence is lo-
cated in the ultrared domain at about 2 10 - 2,51A. The monocry-
stale investigated here were bred from a melt in the vacuum and
the process of breeding is here discussed in short. The crystals
bred in this manner were colored intensively, viz. C&F2 red,
SrF2 orange-red and B&F2 orange. This coloring is caused by the
existence of strong absorption bands within the visible domain
of the spectrum. The spectrum of the CaF2-crystal containing
uranium, which was bred in this way, is shown in a diagram. The
absorption spectrum consists of some absorption bands in the
Card 1/3 ultraviolet visible and infrared domain of the spectrum. The

The Luminescence of Trival*nt Uranium
2o-lU-4-18/63
position of the maxima valid for room temperature is given
here. The absorption spectra of the uranium-containing cry-
stals of SrF2 and BaF2 are of similar character. The number and
the shape of the bands remains unchanged for these crystals,
but the intensive bands are shifted towards the short-waved
side. The device for the investigation of the luminescence
spectrum to described in short. The luminescence of the CaF2
crystals is very intense already at room temperature and con-
sists of some bands located within the domain 2,1-2,51~. At
room temporature four bands are observed. The luminescence
spectra of the crystals SrP2-U and BaF2-U are located in the
same domain but differ with respect to structural details.
Several reasons indicate that the here discussed luminescence
is due to the trivalent ions U+++. The reasons are enumerated
in detail. There are 1 figure and 16 references, 6 of which
are Slavic.
Card 2/3

The Luminescence of Trivalent Uranium
2o-114-4-i8/63
PRESENTED: January 14, 1957, by A.N. Terenin, Member of the Academy
I
SUBMITTED: January 8, 1957
Card 3/3

FZOFILOV, P.P.; KUZIMTSOVA, L.A.
"atrometry for determining the chromium
content in synthetic rubies. tnzh.-fiz.zhur. no.4:46-52 AP 158.
(KIR& 11:7)
(Rubies) (Scintillation spectrometry)

KUPREVICH, V.V.; STEPANOV, I.V.r4wrILOV, P.P.
Catbodo luminnocont ocroon Of ~ngt ~rOUC6 Ing pownre Inzto-floo
zhur. no.11:130-132 N 156. (MIRA 1291)
(Luminescent substances)

51-- 4 -2-28/28
'AU'THORS: Kaliteyevskiy, N., Neporent, B. and Feofilov, P.
TITLE: XI-th Conference on Spectroscopy. (XI s~`v-es~chaniye
po spektroskopii .
PEMIODIOAL: Optika i Szektroskopiya, 1958, Vol.IV, Nr.2, pp.282-281L
(U6SR)
ABSTIMLCT: XI-th Conference on Spectroscopy, organized by the
Spectroscopy Commission of the Academy.of Sciences,of
the USSR, was held in Moscow on 2-10 December, 1957.
This Conference was limited to the problems of physics
of atomic and molecular spectra and to spectroscopy of
solid bodies including luminescence methods. GOO
delegates from 36 Soviet towns took part in the
Conference, as well as 12 foreign visitors from 8
countries. The Conference was opened by S.L.
Mandell.shtam. and a review lecture of S.D1 . Frisho
'Soviet Spectroscoptr in the Last 40 Years" was heard.
In 't plenary and'-12 sectional oessions about 130 papers
were read. Over 30 papers were on atomic spectroscopy,
about 60 dealt vrith molecular spectra and the remainder
were concerned with the spectroscopy of solid bodies.
Card 113 A more detailed report of this Conference will be

xi-th Conference on Spectroscopy. 51-- 1,-2-428/28
published in 'rUspekhi Fizicheskikh Nauk". In atomic
spectroscopy the papers dealt with four main problems;
(1) calculation of enerea levels of atoms and determiin-
ation of atomic constants, (2) interaction of the
nucleus with the electron envelope, (3) spectroscopy
of gaseous discharges, (4) spectroscopic methods of
determination of teraperature. The largest number of
papers presented at the Conference dealt with molecular
spectra. The subjects reported on included electron
and vibrational spectra, Raman spectra, rotational spectra
and Rayleigh scattering of light as well as dispersion
in organic substances. Papers on crystal spectroscopy
dealt with the following problems: (1) spectroscopy of
molecular c s--als, (2) spectroscopic detection of
excitons, M of ionic crystals containing
spectroscopy
activating centres, (4) spectroscopy of colour centres in
ionic crystals. Papers on spectroscopic instruments
were also read at the Conference. In spite of limitation
of the subjects dealt with at the Conference, the
sessions were overloaded and further limitation of the
Card 2/3 subject is suggested for the next conference. The

51-.* 47-2-2P_/2,73,
XI-th Conference on Spectroscopy.
general conclusions are that the spectroscopic theory
has reached a higher stage of development. Further
advances tiere made in the infrared spectroscopy as, well
as in radio-spectroscopy. Spectroscopic investigations
of gaseous discharLes and the viork on Raman scattering
were well represented. The number of papers on
spectroscopy of solids had increased and the tecbnique
of spectroscopic studies has improved.
1. Conferences-Spectroseopy-Moscow 2, Spectroscopy-USM
Card 3/3

/C~O F ~
AUTEORS Arkhangel'skaya, V.A. and Feofilov, F.P.
TITLE Zeeman Effect of Anisatropic Centroc in the Cubic Crystal Lattice
(Yavloniye, zeemana dlya anizatropaykh tsentrov v Imbicheskoy
kristallicheskoy reshatka)
PERIODIULt OptikaA Spektroskopiya, 1958, Vol IV, Hr 5, pp. 602-619 (USSR)
ABSTRACT: Study of magnetic splitting of spectral lines of auisotropic
centres makes it possible to find the orieutatioa of these contras
-with,respect to the symmetry axes of the orystal and to find the
multipolarity of tranaltIons of the spectral lines of absorption
or emission. From the orientation of centres one can wake
deductions on their structure and their noarast neighbours.
From the multipolarity of tr~--nsitionz one can deduce the energy
levels of these contras. The first part of this paper Is a
theoretical consideration of magnetic splitting of spectral lines
in crystals with the anisotropic contras oriented in different
mays withLrespect to the symmetry axes. The second part of the
paper compares the calculated and experimental values obtained by
Card 1/3 the study of Zeeman splitting of rare-oarth ion lines in synthetic

Zeeman Eff act of Anisotropic Gentres in the Cubic Cryst&1 Lattice 51-4-5-9/29
fluorite monocryatals. Splitting of both absorption and luminescence
lines was studied In fluorite containing Fr, Nd , Sm. La, Tb, Dy,
'Ho, Er and Tm. Concentration of these Ions 'was of the order of
10-46/s. The samples were In the form of parallelopipeds. The
apparatus Is 'shown in Fig 10. Sample K waa placed inside a Dewar
vessel D filled with liquid nitrogen. The vessel D was placed
between the poles of a large electromagnet. To study the absorption
spectra an Incandescent lamp was used, which was replaced by a
mercury lamp -when luminescence was investigated. A spectrograph
-with a bent diffraction grating, -which had a dispersion of
3.2 A0Imm in the first order, was used. Zoeman splitting of lines
-was -observed in the absorption opectra of fluorite containing Wd,
Sm, Ho and Er, and in the luminescence spectra of crystals with
Sm, Bu (Fir, 11), Tb ~Fig 11), Dy, Ho and Br. Some of these
results are given In Table 7. Ho effect of magnetic field on the
absorption and luminescence spee-~ra of crystals with Pr and on the
luminescence spectra of crystals with Tm was observed. The nature
of the splitting observed experimentally on rare-sarth ions
Card 2/3 corresponded to the calculated values for contras oriented along

Zeeman. Effect of Anisotropic Centras in the Cubic Crystal. Lattica 51-i-5-9/29
the third order symmetry axis (Cx). The magpituda of tho magnetic
splitting of the rare-earth lines considerably ex-ceeds the
magnitude of the normal Zeeman splitting. This obser7ation agrees
fully with the results reported by Becquerel (Raf 2). From the
splitting of spectral lines the miture of tfis elemantary
oscillators vas determined (results are g1ven In Table 9). In
the luminescence spectra of fluorite with Sm (Fig 12, Table 10)
and in the luminescoace spactra of fluorite with Ho and Er (Fig 13)
anomalous Zeeman splitting was observed, whic-H did not agree
with the authors' calculations . There are 13 figures, 10 tables
and 17 references, of which 10 are Soviet, 4 German, 1 French,
Card 3/3 1 English and 1 American.
ASSOCIATION: Gasudarstvennyy dpticher-kiy :Lnstitut im. S.I. Vavilova
(State Optical Institute imeni S.I. Vavilov)
SUEM'TR D july 8, 1957
I Trqnslbtc~ns - Polarity 2. SDectral lines
f--tic splitting 3.
,-r Crystal centers - Energy theory

.I 1eol-11-Ov e,
AUTHOR t Tarasova, L.I. and Foofilov, F.F. 51-4-5-24/29
TITLE; Polarization of Luminescence and the Nature of' Luminescent Contras
in VaCl-Ag and X01-Tl crystals. (Polyarizatalya lywainontsentsii
i priroda lyuminestairuyushchilch tsentrov v lcriGtallakh WaGl-Ag i
KG1-Tl)
-MRIODIGALs Optika i Spektroskoplya, 1958, Vol IV, Nr 5, 9p. 696-697 (USSR)
ABSTRACT, The method of measurement of azimuthal dependences of polarization
of luminescence in cubic crystals reported in Ref 1, makes it possible
to find the orientation of anisotropic luminescence contras in the
crystal lattice. The present paper deals with polarization of the
visible-region luminescence of NaCl-A& and KOl-Tl monocrystals.
The exciting light was polarized by means of a Glan prism. The degree
of polarization of luminescence P and its dependence on orientation
of +.he crystals relatIve to the plane of polarization of the exciting
light mas measued using Savar polariscope. The saraples ware in the
fona of plates cut parallel to the cube edge (100). NaG1 with
2 mol.% of A&C1 vas grown frota malt by the Kyropolous method and
emitted an intense blue band at 400 mr, KC'L-TI had bright luminescence
card 1/2 with three bands in the visible region k475, 54-0 and 610 m110 and it

Polarization of Luminescence and the Nature of Luminescent Centres in NaGl-Ag
and KCI-Tl crystals.
was prepared by L.M. Shamovskiy. The results of measurements are
given in Pigs 1 and 2. The degree of polaritation, of luminescence
for both crystals -was found to be independent of the wavelength of
the exciting light. The value of F is also independent of the
emitted wavelength in the case of KCl-Tl. The asi:mathal dependence of
the degree of polarizati.on of luminaBcance of both crystals shows
that the centres responsible for'their visible lumineecence are partly
anisotropic and they are oriented along the fourth-order symmetry axes
C,j (i.e. in the direction fr= an anion to a cation). This result
contradicts the suggestions put forward in Ref 8 that the centres
in NaCl-Ag are oriented along tho C2 axes. It is usually accepted
that the luminescence centres in alkali-halide phosphors are activator
ions which are optically isotropic. The results rerorted in the
present paper suggest that these centras may be more muplex,
e.g. ion-defect groupings. There are 2 fi6ures and 8 reforencesi
Card 2/2 5 of which are Soviet and 'U junarican,
ASSOCIATIM-1: Fizichoskiy Institut Leningrad s -.cogo fjosudirstvoruiogo Universiteta;
(Phy.sics1nstitute, Lerdngrad State Univeesity), Cos. Opticheskiy
Institut(State Optical Institute)
Octobir 26, IU57
;I,'r i,, 3 - J, Ll i1j. -~5 f,,!~ n c: Po I a r 1 z P.1; I o nAzimuth-Measure,nent
3. CrVs ",ql a -Crow th 1.1. Cryst,).3s-rxci,,;,-,tion

NVOREN'T. B.$. -, PEOF I WV
Sixth conference on luminescence. Opt. I spektr. 4 no. 6:810-811
A 158. (MIRA 11:8)
(laminescence-Congresses) -

AUTHOR: Feofilov, P.P. SOV/51-5-2-23/26
valent Ytterbitzm (Lyaminestaentsiya trekhvalent~ogo
TITLE; Luminescence of Tri
1itterbiya)
p&ja0DjG&Lz OptjL-& I Spoktrealcopiya, 1958, Vol 5, Nr 2, pp 216-219 (USSR)
ABSTRUTU Via author observel ln+Anee resonance J=Jnescenae of ytterbium Iorz
in CaF2, SrFp,, BaF.,i, La203, and ThO,, crystala, as well as in bo.-&,c
beadiv. Very bright lzainaBcence with clear structure -ma observed
In monocrystals of ayathatic fluorite (Cs-Fg) grown with admixture
of YbF,3. CaF2--Th mcaoorya-tala were grown frcm the melt by themakhod
describei by Stepano7 in Ref 8. The absorptioa spectra of these crystals
had a characteristic ban-1 vith a maximum near 365 mtk and which -ms duo-
to Yb" Iona (see Ref 1"). This band indicatse that partial reduction
of ytbarbium occurs In these orystals. in the near infrared region
two intense and very narrow line-,~ -were found at 9746.4 and 97.6.7 R, as
Nvell as a diffaie line near S100 L these lines are ascribed to the
Yb**t Lane. The v'-rJth of -the separate component-, of the 974e/qn.-l
dzublet does not ecnsee,'. 3 1 (ass Fig 2.). The intensity of the,
Card 1/4 974,6 1 componerat ef the dou'--le-b is greater than that of the 9737 X
component. Fig 1 showa tho spentram obtainal fcr this doublet using

SOV/51-5-2-23/26
Igmineacence of Trivalent Ytterbl-zm
the 119parent 3pectromster (Rof 9). In the lalt'raviolet spezztram of
CAP^-To a -wide stract-,re-leas ab-scrptio-- band with a maTimm-M -near
2550j, -was observel (Fig 2). This ban! is due to the t-ransition of a
4f-electron to the 5d-sholl. ExclItation In the region of this
short-mval=gth ultraviolet band pzcduce4 intense luminescence whose
.spectram, liea in the nea.- infrar&i. The two most intemse ard sharp
lines in the luminesesnea spa!:t.-.-,m ,.oin.-A-119 r3mactly with the positions
u'L the abacrpticn linea. Thia indicates that ve are dealing here with
the F, --2F7/9 trar.51tiorz. FIC z shows the laminescenco speetrum of
CaF,,-Yb,. obtained using the apparatas of llep,,cent, arA. Kloc-hko-;- (Ref 11)
nascence was excited using the PAK-A mer,=ry lamp. Fig 4 shows
the absorption (part a) and luminescenco (part b) spectra of
CaF-,-Yb obtained by photographing the screoa of an sloctron-optical
convertere - Thig f1pro canfirm the resorAnco uatu'v) cil lumilawsconco.
The luminescence linea at 20cC waro at 9100, 9V0, 9736.7, 9745.4,
9850 and 10R0 A. On cooling tv only the resonan.-a doa!~Iet 8,t
9t"35.1 and 9745.1 .9 and the 103~0 I line rawained. Disappearance of the
other linw at thia tempera-bira inii,-Ltea that a redistribution of
Card 2/4 electrons in aub-levels of the exalted etatq 2F,5/2 talce-s place.

SOV/51-5-2-23/26
Luminescence of Trivalont Yttsrb1,=
1.i=inasaen-2:a of +-rivalent ytter"Amm u=z1a+z C:r axeltatio= of an
T
electron from the 4f--,ihjpl-' t-~ the &.-i-tholl,radiat1cm4.e-s3 transition
to the aicAted atate to. 2,Fq/, anl, finally emifision of light on transition
from 2F5/1', t life~Lae or the e--f:U~tej 3tate at 200G va-,
M 2F7/S- M-0
founA ~v e 4: x I The c~~-:Matvr stremgt.!~. for the trawiticr-
I t ,
?F F7~, to be 1.7 X .10-6. The author diacusse-3
brfelly the lwninea~.~arumr of t-i-mlent ytter'1-11-1.m in other orptallit listei
abD-;e and in borax be&ds. In all m3ez kaminei,:!ence was excited only
on!rraliatio-, with ahort-mVelength ---altraviolet. From the absorpticm
aW, 1,zminea conl.:e spsitra of tha Za.F;-,1-Tb -rystals t~aa stractara of the
2-v leve'-'A in the -A*1,-1Cr4-t2 latti--o wa-a deduzed. To explain tho
calearrence 1:-f the 1011Z-O I M-e and the resonanc-o Anea at 9360 a nil
9100 A the author aasame,, tho syiaten~-i r,~' levela due to interaction Of
electrcn atatoa -with latti~~e The authox thanici
Ca rd 3/4

SOV/51-5-2-23/26
Luminescence of Trivalent Ytterbium
LIA. Vasillyeva and IN. Stepanov 'who grew the crystals used in this
work and O.V. Solcolova and V.A. Arkhipov -who helped in the measurement
of spectra. There are 4 fipres and 14 references, 7 of-which are
Soviet, 2 American, 2 German, 2 outch and 1 French.
A,BSOGIATIONtGosudarstvennyy opticheskiy institut im. S.I. Vavilova (State
Optical Institute imeni S.I. Vavilov)
SUBUITTSDi March 8, 1958
Card 4/4 1. Ytterbuim--Luminescence 2. Single crystals--Luminescence
3. Single cry stals--Growth 4. Spectrographic analysis--Applications

IMPOX31PEj B.S., doktor fiziko-matematicheslcikh nauk; Y-FIQ?ILOV, P.P., doktor
fiziko-matematichaskikh muk
Mblacular fluoreacence and fluorascence analysic; confarance in
Leningrad. Vast. AN SSSR 28 no. 6:108-110 Je 158. (MIRA 11:7)
(Laniup,-rad-Pluo.-e3cance-Con.-rosses)

AT1THORS:
TITLE:
PERIODICAL:
ABSTRACT:
Card 1/4
Kaliteyevskiyj N., Neporent, B.t Peofilov, ;!-65-1-6110
. ............... . ......................... 11
Transactions of the XI. Congress on Spectroscopy (XI.Sove.-
shchaniye po spektroskopii) II. Molecular Spectroscopy
(II Molekulyarnaya spektroskopiya) Second Part
Uspekhi fizicheskikh nauk, 19581 Vol. 65, Nr 1, pp. 1.45-151
(USSR)
L.'M. Sverdlov, M. G. Borisov, Yu. V. Klochkove4i.Vp Ye..P.
Kraynov, V.S. Kukina and N. V. Tarasova dealt with the
vibration spectra of unsaturated compounds, M. A. Kovnerq
A. M. Bogomolov and B. I. Snegirev reported on the intensi-
ties and characteristic frequenoieB in vibration spectra of
substituted benzenes. Zh. Lekont (France) reported on work
of the Department of Infrared Spectroscopy of the Institute
of Physics of the Sorbonne. G. qbmpson (England) also spoke
about infrared spectroscopy, as well as A. N. Tererxin, V. P.
Filimonov and D. S. Bystrov (infrared spectra of metal halides,
as AlBr39 AlCl I SnCl ). A. A. Babushkin reported on investi-
gations carriea out with his coworkers of vibration spectra
of complex paratungsten hydrates. M. 0. Biilanin and N. D.'

53-65-1-8/10
Transactions of the XI. Congress on Spectroscopy. II. Molecular Spectro-
scopy. Second Part
Orlova spoke about the modification of the rotation vibra-
tion spectra of some simple molecules on transition of vapor
to the solution. I. V. Demidenkova and L. 0. Shcherby spoke
about the relationship between the vibration spectra in the
vapor and in the solution. Y. P. Lisitsa and V. N. M-alinko
reported on investigatious of frequency and intensity in
vibration spectra of carbon tetrachloride. 0. V. Fialkovskaya
reported on infrared spectra of naphthalene, anthracene and
phenanthrene in different states of aggregation (vapor, so-
lution, crystal) and G. T~mpson (E:ngland) talked on the in-
fluence of the solvent upon the infrared spectra. Ye. P.
Vasenkoj A. P. Chernyavokaya and N. V. Chernaya dealt with
the effect of dissolved salts on the spectra of solvents
(in formamide and water). M. Ye. Movsesyang M. I. Kabaohnik?
S..T. Ioffe and K. V. Vatsuro used infrared absorption spectra
for the investigation of ketoenol-tautomers and reported on
the temperature dependence of these spectra on the heats of
transformation from the liquid to the gaseous state. B. I.
Stepanov~ and Ya. S. Xhvashchevskinheld a lecture on the
spectroscopy of the negative flow of radiant energy. M. L.
Card 2/4 Veyngerov and A. A. Sivkov dealt with similar problems.

53-65-1-8110
Transactions of the XI. Congress on Spectroscopy. II. Molecular Spectro-
scopy. Second Part
V. V. Nalimov reported on systems for the detection of infra-
red spectra, and Member of the Academy G. S. Landeberg dealt
with problems of the combination dispersion of light, as
well as A. 1. Sokolovskaya and P. A. Bazhulin. P. P. Shory-
gin and Z. F. Illisheva spoke about the influence of the
non-complanarity of parts of aromatic molecules on their
propertieev V. T. Aleksanyan) Kh. Ye. Sterin, L. A. Mellni-
kov and A. F. Plate reported on the spectra of combination
dispersion of unsaturated hydrocarbons, R. R. Shagidullin
on vibration spectra of some phosphorus compounds. The in-
vestigation of various spectroscopically determined hydrogen
compounds and of their influence on the molecular properties
was the subject matter of a series of lectures, held by
V. M. Chulanovskiy, D. Khadzhi (Yugoslavia), V. I. Malyshev
and V. I. Murzin, S. A. Ukholin and M. Z. Fronina, A. I.
Stekhanov, A. I. Hodionov, D. N. Shigorin, T. V. Talalayeva
and K. A. Kochetkov, An-Mendok, M. F. %ks and 'D. S. Nedzvet-
skiy, as well as by I. V. Obreimov and Ye. F. Yamshchikova.
Card A number of scientists further reported on investigations in

53-65-1-8/10
Transactions of the XI. Congress on Spectroscon II. Molecular Spectro-
scopy. Second Part
part theoretical~ in part experimental on the vitreous state
and high-polymer compounds, as M. V. VolIkenshteyn, A. M.
Prim (Vibration spectra of silicates), Ya. S. ~obovich and
T. P. Tulub investigated the influence of various elements
on the structure of orthosilicate glasses with the help of
combinationdispersion spectra, V. V. Obukhov-Denisov2 N. X.
Sobolev and V. P. Cheremisinov (investigation.of GeO and
2
P205~ 9 Yet Pe, N. Sobolev (infrared spectrum of
B 0 , V. N. Nikitin, B. Z. Volchek and 0. B. Ptitsyn (infra-
2 3
red spectra of polymers), I. I. Novak investigated the inter-
molecular interaction with the help of infrared absorption
spectra. ff. G. Yaroslavskiy and A. Yet Stanevich talked on
rotation spectra. Finally A. V. Mellnikov, A. A. Morozov,
F. I. Skripov, ff. A. Irieova, A. I. Barahukov and A. M.
Prokhorov reported on radiospectroscopy.
1. %leoular spectroscopy--m
Card 4/4

AUTHORS: Kaliteyevs ki y, ff., Keporent, B*, ~ofilov,
neaction. of the XI. Congress onL'of _i'0V_1'_* Sove-
TITLE: Tra spectroscopy
shchani7e po s~ektroskopii) I. Atomic Spectroscopy (I.Atomnaya
spektroskopiya
PERIODICAL: Uspekhi fiziaheskikh nauk, 1958, vol. 65, Nr 1, PP- 141-145
(USSR)
ABSTRACT: The XI. Congress on Spectroscopy was held at Moscow from
December 2 - lo, 1957. The program was devoted to physical
problems of atomic and molecularspectra and to the spectra
of solids. The congress'was attended by 6oo delegates from
36 cities of the USSR, as well as by 12 foreign scientists
from Great Britain, Eastern and Western Germany, China,
Roumania, the USA, France and Yugoslavia. (The X. Congress
on Spectroscopy held at L'vov in 1956 was attended by about
1500 delegates who delivered 300 lectures). The XI. congress
was arranged in'7 plenary mes-cings and 12 sectional meetings,
in the course of which more than 125 lectures were heldt 3o
of them dealing with atomic spectroscopy, about 6o with mo-
Card 1/.3 lecular spectroscopy and the remainder with the spectroscopy

53-65-1-6/1o
Transaction of the XI. Congress on Spectroscopy. I. Atomic Spectroscopy
of solids. Se.L. Mandellahtam opened the congress. S. E.
Prish held the opening lecture: "40 years of Soviet Spectro-
soopy" and the participants honored the memory of the de-
ceasel Msiber of the Academy G. S. Landsberg. The theoretic-
al and the experimental lectures concerning atomic spectro-
scopy dealt with 4 basic problems: The computation of the
energy levels of the atoms and the determination of the
atomic constants, the interaction between the nucleus and
the shell, gas discharge opeatroscopy,'and finally to the
spectroscopical methods of temperature determination. The
following scientists lectured or took part in the discussion:
Yu. N. Demkov (computation of theeaergy of the He-atom in
its ground state). M. G. Veselov, I. B. Bersuker, A. P.
Yutsis and coworkers, L. A. Vaynshteyn, N. P. Penkin, Yu. I.
Ostrovskiy, L. ff. Shabanov (spectra of atoms with a filled
3d-shell), A. M. Shukhtin, V. S. Yegorov (application of
the "crotch-method" (met. kryukov) by Rozhdestvenskiy for
the investigation of fast varying processes, e.g. pulsed
discharges), Yu. P. Dontsov (investigation of about 6o lines
of Zr I and Zr II) N. G. Morozova, G. P. Startsev, A. R.
Card 2/3 Striganov (U I, U II spectra), M. S. Frim, N. I. Kaliteyevskiy'p

53-65-11-6/1o
Transaction of the XI. Congress on Spectroscopy. I. Atomic Spectroscopy
V. I. Perelf, I. M. P. Chaykw(magnetic and quadrupole-inter-
aotion.between nucleus and shell), No R. Batarchukova,,G. 1'.
Drukarev, V, I. Ochkur (determina.tion of the exciting
function for R-atome at low impact energies), Go Go Dolgov,
So E. Prish, I. P. Bogdanova (excitation of spectral lines
in the range of the negative glow), V. A. Fabrikant, Yu. M.
Kagan, M. A. Mazing, So L. Mandel'shtam (spectral line
broadening), V Kofan'- Lokhte-Kholltgreven (Western
Germany), R. Rito,h*ie astern Germany), I. V. Dvornikovat
No No Sobolev, Bartel's (Western Germany), A. L. Labudn, Ye.
Go Martinkov and I. G. Nekrashevich. Finally M. Z. Kho-khlov,
Ls V. Leskov and L. P. Vasil I yeva reviewed. the problem-:of,:, -
the determination of the discharge temperature according to
molecular spectra.
Neutron spectroscopv--USSR
Card 3/3
Ok

53-65-1-9/10
OTHORS: Kaliteyev.skiy, Y., Neporent, Bep
,TITLE: Transactions of the XI. Congress on Spectroscopy.(XI Sove-.
shchaniye po spektroskopii) III. Spectroscopy of Solids
(III.Spektro-okopiya tverdogo tela)
PERIODICAL: Uspekhi,fizioheskikh nauk, 1958, Vol. 65, Nr 19 ppe 151-155
(USSR)
ABSTRAW: This Congress was held in Moscow from December 2 to December
10, 1957. The lectures on the spectroscopy of solids dealt
with the following basic problems. 1) Speatroscopy of mole-
cule crystals, 2) Problems of the spectroscopical electron
determination. 3) S ectroscopy of ionic crystals with acti-
vated centers and 45 Spectroscopy of color centers in ionic
crystals. The first lecture of this series was held by A. FO
Prikhot!ko (Kiyev) on the absorption and the luminescence
of crystals of organic compounds and on the influence of
structural factors and of external actions on the electron
spectra of such crystals. V. S. Medvedev reviewed the methods
Card 1A and the equipment serving for the optical and spectrosoopical

53-65-1-9/10
Transactions of the XI. Congress on Spectroscopy. III. Spectroooopy of Solids
investigation of crystals at low temperatures. A. F. Prikhotlko,
I. Ya. Fugoll and S. Z. Shullgi investigated thS lumineacens3e
of anthracene crystals in polarized light at 2o K,and V. I.
Broude lectured on the influence of deformations on the eled-
tron spectrum of crystals. A lecture prepared and held by a
group of authors of the Institute of Physics AS USSR and
from the Physical-Chemical Institute imeni Karpov (V. L.
Broudeq Yes A. Izraileviohy A. L. Liberman, M. 1. Onopriyenko7
0. S. Pakhomoval A. F. Prikhottko and A. I. Shatenshteyn)
concerned the investigation of electron spectra of aromatic
hydrocarbons and of their deutero-derivatives at 2ooK. M. S.
Brodin and M. S. Boskin reported on anomaly investigations
in benzanthrene crystals. E. V. Shpollskiy communicated nem-
results of spectral investigations of aromatic hydrocarbons
in frozen solutions. With the theory of molecule crystals
dealt the lectures by A. F. Lubchenko and E. I. Rashba, as
well as by N. D. Zhevandrov. A. F. Yatsenko reported on the
investigation of infrared absorption spectra of barium ti-
tanate crystals and of some seignette-electric substances of
Perovekite type. Ye. F. Gross and his coworkers devoted their
Card 2/4 attention to the spectroscopical electron determination in

53-65-1-9/10,
Transactions of the XI. Congress on Spectroscopy. III. Spectroscopy of Solids
semiconductor crystals# as'well as Be S. Razbirin, V. V.
Sobolev and hT. A. Yakobsont E. and Me Griyo (Franoq)repor-ted
on structural analyses of luminescence spectra in MS-cryistals
at low temperatures; a similar subject was dealt with by
V. L. Broude, V. V. Yeremenko and E. I. Rashbaq I. S. Gorban'
spoke about investigations of the temperature dependence of
"exciton" absorption spectra in cuprous oxides B. 1.
Zakharchenya reviewed investigations of the Zeeman,.effeot in
cuprous oxide.-I. Z. Fisher gave a theoretical discourse on
the existenoe-oonditions and the spectroscopical determinia.-
tion-of the exciton. Great interest was aroused by the-
lecture by S. 1. Pekar on the propagation of electromagnetic
waves in a medium.,V. S. Mashkevich, Ye. L. Feynberg spoke
about their propagation in crystala, and I.J. Sobellman.
reported on~colle6tive oscillations of electrons in orystals
and Yu. Yee Perlin spoke about theoretical investigations of
light dispersion in crystals. The following lectures dealt
with the activating impurities in crystals: by Me I. Petrashen'
Card 3/4 and T. L. Gutman, Ch..B. Lushchik and N. Yee Lushchik (luini-

53-65-1-9110
Tzansactions of the XI. Congress on Spectroscopy-. III. Spectroscopy, of Solids.
neseence:spectra in alkali-halogen crystals) and M. L. Kats.
Lectures by V. A. Arkhangel'skaya as well as by G. Dike (USA)
dealt with the Zeeman effect in crystalsi V. T. Aleksanyan
reported on investigations of absorption spectra of compounds
of quadrivalent uranium and A. N. Sevchenko gave a survey
of spectral investigations of uranyl compounds. I. V. Abarenkov
reviewed quantum mechanical computations of some properties
of the F-centers, V. M. Buymietrov and A. A. Shatalov re-
ported on similar problems. V. K. Prokoflyev and' I. A. Shashin
finally lectured on new designs of spectral apparatus.
1. Spectroscopy--USSR
Card 4/4

24(4) PHASE I BOOK "XPLOITATION SOV/2533
Fecifilov, Petr Petravich
- - -------------
Pol arizovannaya lyuminestsentsiya atomov, molekul i kristallov
Luminescence of Atoms, Molecules, and Crystals)
Moscow, Fi=atgiz, 1959. 288 P. 5,000 copies printed.
Ed,.: Ye. B. Kuznetsova; Tech. Ed..: N. Ya. Murashova.
RMPOSE: This book is intended for scientific workers, engineers,
and aspirants, in.the field of optics, and also for students
in advanced cours6s in optics at vuzes.
COVERAGE: The book deals with problems connected with the polar-
ization of radiation and describes common concepts,of aniso-
tropy in the elementary acts of absorption and radiation. Infor-
mation is given on experimental and theoretical results of '
studies on the polarization of resonance radiation, --the fluores-
cence of atoms, and the polarization of the luminescence of
diatomic crystals, complex molecules, and crystals. No person-
alities are mentioned. There are 257 references: 101 Soviet,
58 English, 40 French,.and 58 German.
Card 14

Polarized (Cont.) SOV/2553
TABLE OF CONTENTS:
Foreword 6
Ch. 1. Introduction. Elementary Radiators and the Polarization
of Radiation
1. Elementary radiators in classical electrodynamics 12
a Radiation field of an elementary electrical dipole 12
b Radiation field of an elementary electrical rotator 16
c: Radiation field of high-order radiators 17
d. Retarding-radiation field of electrons 22
e. Vavilov-Cherenkov radiation field 23
2. Classical dipole oscillator in a magnetic field ( 11normal"
Zeeman effect) 23
3. Elementary radiators in the quantum theory 27
a. Selection rule for the magnetic quantum number and the
polarization rule 27
b. Zeeman effect 32
c. Intensity of Zeeman separation components 34
d. Radiations of high order. Magnetic dipole and quadru-
pole radiations.. 38
Card 2/7

'. I v
ggg
31 I'M 05,100" ;fig,
-00

Polarized (Cont.)
SOV/253.3
4. Occurrence of polarized radiation 44
a. Polarized-radiation as a result of the nitural aniso-..~-~,
I t;,qp y: of , a. tysten 44
b. Radiation polarization as a result of the effect of
electrical and magnetic fields 46
c. Light ray as a factor producing radiation polarization 47
d. Calculating polarization by determining the yield of
luminescence 52
Ch. 2. Polarization of Resonance Radiation and Atomic Fluores-
cenae. 54
1. Phenomenology of mercury resonance radiation polarization 55
2. Classical theory of the polarization of resonance ra-
diation 56
3. Quantum theory of resonance radiation polarization 59
a. Basis of the theory 59
b. Computing the functional value P(J) 63
4. Degree of circularity of resonance.radiation 68
5. Polarization of resonance radiation and the superthin
structure of spectral lines 75
6. Polarization of atomic fluorescence 8o
Card 3,~

Polarized (Cont.) SOV/2533
--4j2'--4'j3
a. The open process (j
)
j
b. The closed process Jl --- P, Jo -4
3__4j
t
f
ti
h
7. reson-
on o
The effect of collisions on t
e polariza
ance radiation and atomic fluorescence 56
B. Optical method of atomic orientation 100
Ch. 3. Polarization of the Luminescence of Diatomic Molecules 104
1. Polarization of the luminescence of diatomic molecules
(classicalitheory) 104
2. Quantum mechanical theory of the polarization of radia-
tion from diatomic molecules 107
a. Some data from the spectra theory of diatomic mol-
ecules 107
b. Polarization theory of-the radiation of diatomic
molecules 112
3. Comparison with experimental findings 117
4. Effect of collisiorys on the fluorescence polarization of
diatomic molec,~les 118
Ch. 4. Polarization of the Luminescence of Complex Molecules 121
Card 4/7'

Polarized (Cont.)
; ; SOV/2533
1. Demonstrating the phenomenon with the aid of an oscil,w.
lat.pry, model
20 Polarization spectra as an expreSsion-of the anisotropy
.of molecular absorption
3. Polarization spectra and molecular structure
4. Boundary polarization of luminescence and molecular
symmetry
5. PolariZation spectra of'dyes with nearly symmetrical
structures
60 Possibility of developing a strict theory of luminescence
polarIzatIon In complqx molecules
7. Rotational depd~arization of luminescence and some.prb-
blebzs,- :of- the ~ liquid -'stAte', theory
8. Concentrational depol'arization of luminescence and inter-
molecular exchange of excitation energies
9. Polarization,of the prolonged "afterglow" of organic
mol6oules 1
a. Polarization of afterglow which is spectrally similar
to Instantaheous fluorescence
b. Polarization of long-wav6 afterglow of organle mol-
ecules
Card 5/7
122
127
134.
143
151
155
16o
166
177
178
183

Polarized (Cont.) SOV/2533
Ch. 5. Polarized Radiation of Crystals 187
1. Polarized radiation of optically anisotropic crystals 187
2. Polarized radiation of cubic crystals . 1 196
a. The azimuthal dependency of luminescence polarization
of cubic crystal* and orientation of luminescent ..
centers 198
b. Experimental determination of the orientation of lu-
minescent centers 207
3. Anisotropic photochemical processes in cubic crystals 219.
Ch. 6. Radiation Polarization and the Nature (Multipolarity)
of Elementary Radiators 233
1. Experimental method of determining the multipolarity of
elementary radiators 233
2. Nature of elementary oscill4tors and photoluminescence po-
larization of isotropic media 237
3. Nature of elementary oscillatora and photolumineacence
polarization of cubic crystals 24-8
4. Experimental determination of the n4ture of elementary
oscillators of luminescent centers in cubic crystals 259
CO'ard 6/17

Polarized (Cont.) SOV12533
a. Nature of elementary radiators of luminescent dye cen-
ters in fluorite crystals 259
b. Nature of elementary radiators of the Eu+++ ion in the
crystal lattice of fluorite 261
Ch. 7. Experimental Methods of Investigating Radiation Polar-
ization 267
1- Obtaining twlarized light 267
2. Measuring the degree of radiation polarization 269
a. Visual methods',ofmeasuring the degree of polarization 2TO
b. Photographic methods of measuring the degree of polar-
ization
a. Photoelectric methods of measuring the degree of
polarization 277
d, Measuring the degree of radiation circularity 279
Bibliography 280
AVAILABLE: Library of Congress
T?Vjb
10-28-59,
Card 71T

AUTHCR: Foofilov, P.P. SOV51-6-2-18/39
TITIX On Absorption and Luminescence Spoctra of the Ce4'++ Ions (0 spoictrekh
pogloshchaniya i lyumineatoonstii ionov Go+++) -
F"BRIODiCAL; Optika i Spektroskopiya, 1959, Vol 6, Nr 2, pp 234-236 (USSR)
ABSTEACT: Monocrystals of fluorite (CaF2) with jo-4-10-2 g/g of Ce were grown
for the author by M.A. Vasil'yova. and I.V. Stepanov (Ref 3). Cerium
was introduced in the form of GeF3 or C002. The infrared absorption
spectra were obtained using a ro,:-ording spectrophotometer UR-10 with
a UP prism. These spectra were recorded with the help of A.N. Sidorov.
In all samples studied an absorption band was observed at 3-6 IL. This
band had a structure which differed from sample to sample. This
structure vas observed even at room temperature. Fig 1 shows, by way
of example, spectrograms of two samples with 10-2&/& of 09. 'The
differences between the spectra of individual samples were due -to
differences in the structure around Go ions; the latter differonco3
were due to variations in the method of preparation. 'rhe peak of tho
observId band was at 4-5 Ii and it Yes ascribed to forbidden transitions
Card 1/3 2F5/2- F7/2 Of the 4f-electron in Ce+++. In the ultraviolet region

SOV/51-6-2-18/39
on Absorption and LuminescenceSpectra or the Go.. Ions
CaFp-Ce crystals absorb strongly. This absorption is characteristic
of Ge+++ ions and is due to allowed 4.f-bd transitions. The absorption
in the ultraviolet is 2-3 times stronger than the infrared absorption.
Again variations in the recorded spectrum were observed from sample
to sample; as before, these variations were ascribed to differences of
the structure in the immediate vicinity of the Ce+++ ions. Fig 2a
shows two typical ultraviolet absorption ispectra with maxims at 330 and
306 m1i. On cooling to the liquid-nitrogen temperature clear line
structure vas observed in the ultraviolet absorption spectra.
CaF2-Ge monocryatals exhibited also intense ultraviolet luminescence
(Fig 26) which, like, the ultraviolet absorption, is related to allowed
d-f transitions. The energy terms of the Go.. ions with one 4;f-elec-bron
are very similar to the terms of the Yb.. ion with thirteen
4f-electrons (Ref 1). The main differences between the Yb.. and
Ce+~+ ions lie in the intense d-f luminescence exhibited by G6+++ and
absent in Yb+4+ and in the f-f luminescence which was observed in
Yb+++ but not yet in Go+++. Acknowledgments are made to
,a rd V3

On Absorption and Liminesepnee Spectra of t; he Ge+++ Ions SOV/51-6-2-18/39:
MA. Vasillyeva and I.V. Stepanov-who grow the monocrystals used,
and to O.V. Sokolova who took part in recording of the ultraviolet
spectra. There are 2 figures and 7 references, 4 of which are Soviet.,
2 German and 1 English.
SUBMITTED: June 10, 1958
Gard 3/3

SOV/51-6-3-27/28
AUTHOR: Feofilov, P.P.
TITLE: The Orientation of Centres of Luminescence Lines in X-Ray
Irradiated LiF Crystals (Orientatsiya tsentrov
lineychatoy Iraminestsentsii v rertgenizovannykh kristallakh
LiF)
PERIODIC.A.L: Optika I Spektroskopiya, 1959, Vol 6, Nr 3, pp 426-427,
. (USSR)
ABSTRACT: Pringsheim discovered (Ref.1) narrow lines in the absorption
spectrum of colored LiF at low temperatures,' and
Kaplyanskiy reported (of. preceding article pp 424-6)
aSimilar lines in the luminescence spectrum of X-ray -
Irradiated LiF at 770K. The present author extended
Kaplyanskiy's work by measur._ing spectrophotographically tho-
azimuthal dependence of polarisation of the luminescence lines
observed at 770L in X-ray irradiated LiF. From these
measurements Feofilov deduced (Refs.3,4) that the oentres
responsible for the narrow luminescence lines at 662.7 and
569.8 MI-L are oriented in the same way as those responsible
for the wide red band, i.e. along the second-order symmetry
Card 1/2 axis of the cubic crystal of LIF. This fact, together with
I

SOV/51-6-3-27/28
The Orientation of Centres of Luminescence Lines in X-Ray Irradiatedl
LiF Crystals
the position of the narrow lines near the short-wavelength
edge of the red band and their occurrence only in samples with
intense red emission, suggests that the narrow lines are due
to the same centres which are responsible for the red band,
i F2- or M-eentres. The exact nature of emission of these
Qe*
narrow lines and why they occur only in LiF are still open
questions. There are 5 references, of which 4 are.Soviet
and 1 mixed (English + German).
SUBMITTED: December 15, 1958
Card 2/2

AUTHORS: Galicin, L.N. and Feofi:kqy, P.P.
TITIE: Luminescence Spectra of Trivalant Uranium Ions
67163
6OV/51 -7F -6-321136
PERIODICAL: Optika I spektroskopiya, 1959, Vol 7, No 6, pp 840-841 (USSR)
ABS TRACT In 1957 the authors repcrted absorption and infrared luminescence spectra
of trivalent uranium ions In artificially grown calcium, strontium and
barium fluoride monocrystals (Ref 1). In the present paper the authors
report more detailed data on the luminescence spbctra of these crystals
at room temperature and at -1500C., The crystals ware grown by
I.V. Stapanoy and M.A. Vasill.yeva. from nialt using a technique developed
under the leadership of I.V. Stapanov (Raf 2). Strongly reducing
conditions, which are necessary to obtain crystals with uranium ions of
low valency, were ensu'red by putting some graphite powder into the charge.
The amount of uranium in these crystals was 0.1-0.31. The luminescence
spectra were recorded in the same -way as before (Ref 1). Luminescence
-was excited using a nercury lamp SVD-Sh-250; a call containing water and
heat-absorbing glass was placed between the lamp and the samples in
order to cut out infrared radiation. The exciting light war. modulated
at 300 cls. A mirror monochromator 'with a diffraction grating
(300 lines/mm) was used to analysa luminescence. A lead sulphide
Card L1 U q-

67163
Luminescence Spectra of Trivalent Uranium Ions SOV/51-7-6-31/38
photocell was employed as a receiver and a signal was recorded by means
df a potentiometer EPP-09. The comparatively high sensitivity of the
apparatus made it possible to employ narrow slits (10-30 cm-1 in the
2.5 11 region) and to observe fine structure In the luminescence of those
crystals at low temperatures. It was found that on cooling to -1500C the
intensity of luminescence rose by a factor of 2-3 and this made it
possible to use still narrower slits. The main results are shown in a
figure on p 840; the left-hand part of this figure shovs the luminescence
spectra of C&P2-U, SrF2-U and BaF-U at 200C, while the right-hand part
of the figure shows the luminescence spectra of -bhe same crystals at
-15010. The positions of the emission bands and their general nature
do not differ greatly between the three types of crystals employed.
Cooling produces a clearer picture of the fine structure of the spectrum
and shows the effect of variation of the crystallina-lattica paramerters-
on the luminescence spectra, Table 1 p 481 lists the positions of the
luminescence band maxima at -1WC- An extremely narrow and intense tand
observed at -1860c near 2.2 Ii is displaced monotonically towards shorter
wavelengths on transition from CaF2-U to BaF2-U. On both sides of this
band there are wider bands whose positions approach the former on increase
Card 2/3 of the lattice constant of the base crystal. Such a displacement may be

67163
Luminescence Spectra of Trivalent Uranium Ions
regarded as the result of a change in tho intensity of the internal
olectrical field in the crystal. It is also possible that the
luminescence spectrum structure may be partly of vibrational nature.
The authors suggest that the observed infrared luminescence of
trivalent uranium ions is due to forced electron transitions within
the 5 f-shell, i.e. transitions 4111/2-9- 419/2- According to Jorgensen
(Ref 3) the separation between the two levels just quoted amounts to
4~100 cm-1 (2." ji" which is in satisfactory agreement with the authors'
data on the absorption spectra Of U+3 In MGF2 crystals. There are'
1 figure, 1 table and 3 references, 2 of which are Soviet and 1 Danish.
SUMTTF,Dt July 2, 1959
Card 3/3

67164
ti.,M-O 0 SOV151-7-6-32138
AU TFIOR -Foofilov, P.P.
lyI
TI=.- Orientation of Luminescence Cantra~ in Uranium-Activated Lithium
Fluoride Crystals
FERIODMILs Optika i spektroakopi.ya, 1959, Val 7, No (j, pp 842-843 (USSR)
ABSTMOT: The author's luminescence-polarization method of da tt~ining the
4~y
orientation of luminescence coatres in cubic synson ef 2 was -used
to study LiF-U monocrystals grown by Belyayev at al. (Ref 3). Samples
viere in the form of plates cut parallel to the (100) planes of the cubs.
Luminescence, excited with linearly polarized light, -was found to be
partly polarized and the degree of polarization (P) exhibited a clear
azimuthal dependence anA a strong dependence on the exciting-light
wavelength. The author limited himself to studies of the azimuthal
dependence at negative values of P. The degree of polarization P was
measured visually with a polarimater. Although the degree of polarization
was different at different luminescence wavelangthe,the author measured
only the value of P averaged out for the vhole of luminescence spectrum
because this did not affect the general nature of the azimuthal d8pGndI3%LC8,,
Fig 1 shows the azimuthal dependences obtained using exciting light (Oroln
a mercury lamp SVD-Sh-250) of 405 (curve 1) and 313 ji wavelength (curve 2).
Card 1/2

67164
SOV/51-7-6-32/~36
Orientation of Luminescence Gentres in Uraniwa-Activated Lithium Fluoride Orystairs
The azimuthal dependences of Fig I establish unequivocally that the
luminescence cantres are oriented along fourth-order sy=uetry axes (Gj,).
Using the established orientation and the principle of local charge
compensation, the author suggested a model for a luminescence centra
In LIF-U (Fig 2). & hexavalent uranium Ion (U+6) replaces isomorphously
a lithium ion (Li+). The excess positive charge (+5 units), remaining
after such replacement, is compensated by isomorphous substitution of
five'aut of six fluorine ions (F-) by oxygen ions (0-2). A- kainescanco e0tre
is consequently an anisotropic structure with a definite direction
of orientation along one of the 04 axes - The rosults obtained do not
confirm Runciman's modal of the luminescence cantres In XaF-U (Ref 5),
-which should be identical with the luminescence cantres in LIF-U. There
are 2 figures and 6 references, 4 of which are Soviet and 2 English.
SUBMITTSD. June 20, 1959
Card 2/2

L 3311;7-66
ACC NRt n6oi6mo SOURCE CODE: uR/0058/657oO0T0l1/W32/.DD327
Feofilavo P. P.
AUT[j0R
-217M. SpdEfra of divalent raie-earth ions in crystals of the fluorite type
'SOURCE: Refe zh. Fizika,
Abs. =46
REF SOURCE: Tr. Komis, po spektrookopii. AN SSSRO t- 3., WP- 1, 1964, 533-551
TOPIC, TAW: fluoride mineral,, rare earth elementj, forbidden transition,, absorption
spectrur4 luminescence
'AtSTWT: Synthetic single crystals of the fluorite tnm (MeF2; Me a Ca, Srp Ba) cani
serve as-.a medium stabilizing the ions of rare-earth elements (TH) in the divalent
state. MeF2 crystals activated with Ne+, SM2+,, D?+, Dy2+j H62+, Er2+, TLF+, and
IV+ were cbtained. The MeF Z?+ spectra are characterized by the presence of al-
-16wed- transitions 4fk - 4Xi;d, which are manifest in the form of relatively long-
vmvelbroad, and intense absorption bands, besides the forbidden transitions within
the limits of the 4fk configuration. In many cases one observes a clearly pr
electron-vibrational structure in low-temperature f - d absorption spectra. e spec-
tra and duration of the luminescence of MeF2-n;F+ are determined by the relative loca-
tion of the levels of the configurations 4fk and 4fk-15d, and correspond as a rule to
4f v- 4f forbidden transitions. The high synmetry of the field acting on the TIP+ ions
in the MeF2 determines the magnetic-dipole character of the forbidden transitions., The
ener absorbed by the TR2+ ions can be emitted by the 'same ions or else transferred
to -i nt in a different valence state.
of different elements or of the same eleme'
-,-xlfti~nslation of abstract]
COM, 20
d

ACC NRt AT6000493
SOURCE CODE: UR/0000/6,53/000/000/0232/0236
AUTHOR: Karapetyan, G. 0.; Kariss, Ya. E.; Lunter, S. G.; Yaofilov, P. P.
ORG: none
TITLE: Spectroscopic investigation of.peodymium-activated g!as
SOURCE: VS(-.soyuznoye soveshch"e po stekloobri7nomu Bostoyanlyu. 4th j Le d
qlmgr~ , 1964"
8teklocbrain'-qye sostoyanlye (Vitreous state); trudy soveshchaniya. Leningri-cl, lzd-vo Nauka,-:,
1965, 232-236
TOPIC TAGS: glass property, neodymium glass, spectroscopy
ABSTRACT- The authors make a detailed study of the absorption spectra, luminescence, and
duration of tho excited state of neodymium in relation to glass composition, manufacturing.
conditions, concentration of the activator, and temperature of the specimens. Neodymium was
added-In corc(~iitrations-from--OA--to-10:parts-to, -100-parts by-weight-of-the-g'lasa. --'1`he-absorpt14~.-.-
spectra were Tecorded on specimens, 0.- 2 to 10.0 min thick in the region from 0. 2 to 3.'5 -11.
Luminescence was investigated in the region from 0.8 to 211. It was found that the duration. of
luminescence was the same In all emission bands-.- it did not depend on In which absorption
band excitation occurred and changed with a change of glass coinpasition, Nd concentration
Card 1/2

L k7zoi-bb
ACC NR1 AP6011586 SOURCE CODE: U.R/0051/66/020/003/0526/0528
WTHORS: Oc,syankin, V.; P. 413
ORG: none
1r3+
TITLE:' Triple.optical resonance in crystals BaF E
2
SOURCE: Optika I spektroskopiya, v. 20, no. 3, 1966, 526-528
TOPIC TAGS., barium compound,~fluoride activated crystal, light.
absorption., ir'detection material IO&A-PAU-0P04MA,
I Y,
ABSTRACT:~ The authors.report observation of a phenomenon which can*be
uniquely intlerpreted as.-a result of successive absorption of three
quanta, i. e..Ptriple optical resonance, during the 'Course of observations,;- -
of two-step transitions imvarious crystals with rare-earth activators-.
such as are-employed for making'infrared visible by summation of radia-'
of Er3+ i
'tion (VISOR system). BaF containing high concerntrations ons
2
(up to 5 mol..%) intensely illuminated with ir light with a short-wave
-.end point near 1.2 4i showed a clearcut yellow-green glow at 77K, the-,,,
t
spectrum of iiihich consists of two groups of lines near 540 and 650 nm
characteristic of the Er3+-ion.-. Comparison of the level scheme of Er_3+
with'the observed spectrum precludes the possibility of attributing this,'?-"
Card UDC: 935.349.548.o

. U- .....
-. PE W ~Ei . N
"R - 1 -,-, IN
.: -fl
I 'Will MC-11--ommm'

EWT(J)/B~T(m)/EY1P(t)/ETI.. IJP(c) DS/JYI/M/JG
L 304o7-66-
ACC NR: ~P6020798 SOURCE CODEt M;VO386/66/003/032/0494/0497~
AUTHOR: Ovsyankin, V. V., eofilov, P. Po.
ORG: none
TITLE: Mechanism of summation of electronic excitations in activated crystals
SOURCE: Zhurnal eksperimentallnoy i teoretichaskoy fiziki. Fis'ma, Y redaktsiyu.
Prilozheniye, v. 3, no. 12) 1966p 494-497
TOPIC TAGS: activated crystal, fluoride, calcium fluoridep
strontium compound, barium compound, lead compound, erbium, excited state, photon 1.
emission , L1 i9,y r e-t
ABSTRACT: The authors point out that a widely held opinion, that the visible
radiation excited by ir light in crystals activated with rare-earth ions is the
result of successive absorptiorl,,-Tf two paq9p by on%jenter, M in error, at
P bariumt6l4nd lead activated
least for crystalline fluoridest6f calciumYls~rontiue-
with trivalent erbium JiBy nVestigating the kinetics of the visible glow of these!
crystals vhen excited kith ultraviolet and infrared the authors have found that
in the latter case the relaxation times of the 11iminescence vere almost two orders,
of magnitude higher than when ordinary luminescence is excited. For example, in
2
Card

L 30407-66
ACC NR: Ap6ozo?98
X 10-2
the case of BaF2:Er3+ these times are 1.0 x 10"4 and 0-7 see, respectively.~
This indicates unequivocally that two-quantum excitation cannot be regarded as a
result of successive absorption of quanta by a single center) since the emission
level stops being populated vhen the excitation is removed,, and the dampling of
the glow should have the short relaxation time characteristic of the level. The
stretching of the glow under ir excitation must be attributed to the delay of the
ions in certain intermediate states that result from direct absorption of the ex-
citing quanta. Further evidence in favor of the assumption that an intermediate
stage detexmined by the interaction of the glow centers plays an important role
in this phenomenon lies in the fact that a near-quadratic dependence on the acti-
vator concentration is observed for the intensity of the stationary glow excited
by the two-quantum mechanism. It is concluded that the proper mechanism consists
of resonant, energy migration between the activator ions, whereby the energ3r of two',
or three sufficiently close activating ions is so redistributed that one ion goes
over into a state with approxhiately double or triple the energy. It Is suggested~;
that this mechanism can explain several pbysical and photochemical process S,q ! --
particularly photosynthesis. The authors thank Ve N' Baklanova and Be is -Msk*kov'
for growing the single crystals. tuz I
SUB CODE; 20/ SUBM DATE: 17Apr66/ om REP: oo2/ oTH REF: oo6
ATD PRESS%5-0~
I ;Ord 2/2
M M No ME M , ~ JO I ~

r,- 31006-66- (ml/WP(t)- -IJP(c) JDIJGA,
ACC NRi APOM64-417 SOURCE'CObIff! UR/0368/6f
AUTHOR: Mokeyeva, G. A.; Lunlkin, S. P.; reofilov, P. P. 43
ORG: none
IVI
TITLE: Luminescence of praseodymium In silicate glasses 1'~
SOURCE: Zhumal prikladnoy spektroskopAU, Y. 4, no. 3, 1966, 245-251
TOPIC TAGS: praseodymium, ytterbium, luminescence spectrum, silicate glass, low tem-
perature effect
ABSTRACT: Data are given fr%om a study of spectrally luminescent characteristics of
silicate glasses activated by praseodymium ions. The trivalent praseodymim cation
has two 4f electrons and a comparatively small number of singlet (ISO, G4, ID2, 116)
and triplet (3H, 3F, 3p) levels. Absorption and luminescence of crystals and glasses
activated by, praseodymium are* determined by forbidden transitions between these levels
The absorption spectra of the glasses were studied in the spectral region below lu us-
ing an SF-4 spectrophotometer, and in the region of longer waves on the automatic SV-
-50 spectrophotometer made by the Shimadzu Company. The luminescence spectra were re-
corded on installations with diffri6fl6i`i~i~6romators and FEU-38 photomultipliers,
a cooled FEII-22 photomultiplier and a cooled lead sulfide photoresistor. Electronic
EPPV-60-3M 4md PS1-02 potentiometers were used for recording the spectra. The lumi-
UDC: 535.37
Card 1/2

ACC NRt
nescence excitation source was generally a mercury lamp with a 436 mij glass filter.
A diffraction monochromator was used for excitation in some cases. The luminescence
lifetime was measured either with a pulsed tau-meter in combination with a diffractioi
monochromator to isolate ci3rtain sections of the luminescence spectrum, or by an ul-
tratau-meter and a set of light filters. The first method gave the best s
sectral re-
solution while the second gave the highest accuracy for determination of t . Absorp-
tion and luninescence. spectra are given for glass containing 0.2% Pr2O3. The experi-
mental data show a high probability for nonradiative transitions from V levels to,
lower-lying states, particularly to the 'D2 level which is the initial state for a
number ~f intense radiative transitions in the red region of the spectrum. When the
temperature is reduced to 770K, there is a redistribution of intensities in the lumi-
nescence spectrum of trivalent praseodymium favoring the blue-green bands. It is
shown that there is a nonradiative transfer of excitation energy between praseodymium
ions and between praseodymium and ytterbium ions which results in concentration quencl
ing of Pr luminescence in the first case and luminescence sensitization of Yb in the
second. Quenching due to nonradiative energy transfer from praseodymium to ytterbiup
Is less effective when the temperature is reduced to 770K which may be due to 'a reduc.
tion in the overlapping of levels. Orig. art. has: 4 figures, 2 tables. 114
SUB CODE: 20/ SUBM DATE! 1ONar65/
ATD PRESS: 4/!g
ORIG REF: 007/ OTH REF: 002
Card 2/2

7373 C) __ jD/j5ft
T, 2 EW (m) /EWP (e) IEW (t)/ETI IJF(
ALL Mi AVOU135 9 CODE: UR/0051/66/020/003
77 SOURC /0519/0521
~4- j;q -
AUTHORS: Pe trovskiy, 0. T. Feofilov P.Y.; Tqurikova., 0. Aej
ORG:. none
sorption and, luminescence of ivalent samari f
TITLE: Jib d um ~n luorine-:
beryllat(! glas sea
V
SOURCE:
'Optika i spqktroskopiya,. v., 20, no. 3, 1966, 519-521
TOPIC TA(;S-: -samarium, glass-property.,:'ligbt absorptior), luminescencep
gamma.irradiation, optic transition.. 4,;4, r
ABSTRACT:* The authors report the.results of an investigation of absorp-
2+
tion and :luminescence of Sm Ions in oxygen-free fluoro-beryllate-
glasses, On which little-data areavailable,, especially the colored
glasses. The glass-chosen had relatively low tendency to crystalliza-.~-
tion., containing 60% of molecular beryllium fluoride and 20% potassium--
fluoride, and also fluorides of calcium and aluminum. For.better sta
bility, the reduction of the samarium to the divalent state was by . ir-.
6o
radiation with gamma rays from Co The absorption spectrum had a
single broad intense band-with maximum near 520 run, causing red-orange.'
color (tfie glass was yellowish.prior to irradiation). Upon excitationj~.'~
Card 149 UDC: 535.34 + 535.-37:946.65q

- - , - " - % "ii 1-11, %"1F - &; - -
ACC-Mr'-A-P-5025307 -SOURCE CODE: '5/00'r)1/65/019/004/0635/0637
AUTHOR:,. Dubenskii, K.K.; Kariss, Ya. E.; Rysidn, A. L, Feofilov, P. P.; KLI11ko, G-J.'
OIRG: none
-TITLE- Determination of the effective cross section of collistorw of the second kind between
mercury a
0 ; C__-P~ _777
S Optika t spektrookop'iya, v., 19, no. 4, 1965, 635-637
TOPIC TAGS- collision cross Ejection, mercury, zinci fluorescence spectrum
ABSTRAC,r: The collision cr6ss section was determined at 736K at high values of &E (the
energy difference between the levels of the colliding atoms) for the Hg-Zn pair with an
-energy diff, nee __H11_ -6-3p---WZn--,f
ere -- - --in-le-vels g. . l.ai
based on the relative intensity, of sensitized fluorescence of Zn 3076 A (4 3P, - 4 1SO) and
-Hg 2537 A 3P1 - 6 ISO., The effectiv~e: collision cross section was determined from the
formula-- ------
dV
I -A - -if-
TH-9 WH_9 Vilk
-,,7kzu(v)t
dv.
Card 1/2 UDQ. 5M.186. 3- 546. 49:546. 47

TRAMNIKOVAj O.N.; FECFANOVA., Ye.Io
Rotational shift of benzene rings in polystyrene at low ..
temperatures* Zhuro fiz. khim. 35 no.5:1114-1119 My 161.
(MMA 16:7)
1. Isningradskiy.universitet imeni Zhdanova.
(Styrene polymere-Optical properties)

BA.SLAVSKAYA, S.Se; FHOFAltovA, N.B.
Some data on the growth and composition of,Scenedesmus quadri-
cauda (Turp.) Breb. given ammonia and nitrate feedings. Bauch.
dolcl.vys.ohkoly; biol.nauki no.1:147-152 159. (MIRL 12:5)
1
Is Hekomendovana kafedroy fiziologii rastealy Haskovskogo
gosudarstvennogo universiteta im. M.V.,Lomonosova.
(AW.") (PIANTS. XWHCT OF NITROGEN ON)

-----BEIOTI;IA)Y---V-L.-i-SAVARENSKIY--YG.F#;-MFiI~WTOV, V.D.
Determining the energy of the earthquake of Nov. 15, 1959.
Izv.- AN SSSR: Ser..geofiz. no-11:1593-1597 11'60. (KIRA-13:11)
1. Hoskovskiy gosudarotvenMy universitet im. M.V.Lomon'osova.
(Beismometry)
7~1
!Wf W

9-S
S/049/61/000/062/00_4/OiY
D242/D301
AUTHORS.::.. Rykunov L. 1q., and Feofilaktov, V. D.
..TITLE- The Piezoeleictr3.c.source.of..single-shot..ultrasonic
..pulses f9r..seismic. models
PERIODICAL: Akademiya nauk SSSR_ Seriya geofizicheskaya.
Izvestiya, no. 2, 1961, 205-214
TEXT: What-is describedAs made from a.number of plates of arrmon-
itun di'bydrogen phosphate (ADP).of.45O.Z-cut, ..It is shown how t6
mount.this so th 4-t only-one mode. of~.the (P-type) oscillation
(- 50 kc/s) is r. iated. It is further proved theoretically and
conf irmed experi ntally,. that.. excitation by, a single square pulse
of-duration -.1/aWhere.T.- 1150 kc/s),gives.the maximum ampli-
tude of.oscillati:)n. ADP.is preferred.to.Seignetic rates because
it is chemicallylaore stable..and.alters its.properties-only slight-
ly with temperaturie~. It is, however, -less sensitive. i.e. gives
less efficiency. The pile of'.10 plates -is made up into the form
of a 2 6in cube. ~teference is,made to the work of H. Ekstein,
Card 1/6
0.002' 504*_0
P"
N k-
R MHOM

22426
-,5/049/61/000/002/~04/012
D242/D301
(Ref. 2:' F'ree V3* brations. of anisotropii
1944) for some of,the,theory..:.The,det(
.modes is
(Tij -'T,12) 2 PO)t (TI
P(027-Le(y 711) Pwt k2Y"
2 2
PO)2+70(yi 112)1 ns Tie
where k Ir/a a..- side. of cube,, P -. dc
ulus of elasticity (tensor). (Axes,xI,
side of a. plate- and x_3 is. coincident...Tyi
Z-w"is).
Card 216
VW
Odi6s. Phys. Rev., 66,
Lnant of the natural
Tit) --!P0)'+
2
+ 7 k'(Y 11-Y12)
=01
S8
k 72 Yis
NO loyll
Lty. of ADP and Yij, mod-,
are parallel to the
the crystallographic

22426--
S/649/61/QOO/002/004/012
D242/D301
The piezoelectric,.source....
The three. roots. are. given by, ks
n
(01 (Y11 Y12) O&hR NIOAa),
'
..2 = L
Y11 (UTOpaq MOP),
P
= k" .11OAa).
I. Y22) (TPOTbJt
(Y
P
.3
7*i:i--1'V8_g.ck%
a-- 2.1 c1n
P
4 12 4
0.262.10 yn.cM
2
_
,
'
nti
cm2 I' freque
0.141.101.2 dyn.
s .'~676
e -as follows: vl
obtained.
.
62 kc/st v2 - 90 kc/s and-v3 1
. 109 kc/s. The three.modes'of
def ormation. are llustrated.in Fig..l. Experiment gives v a-65
he lines"q

S
1cc/s . v2 '. 88 kc. s, in good agreement...Experiments.along..t
~
of V. M. Prosvir *n.and L. N. Rylcunov (Ref. 3: 0 lcharalctere svob- ti
odn~kh kolebaniy lez~datbhileov,L'ispollzuyemykh pri-moddlirovanii
'
Ip
seysmicheski1ch..y4vleniy.:Izv. 1959)
AN. SSSR-,. ser. geofiz.,.No..5, *
+
Card 3/6
A
-12
gs- Y-Ettg-
tu Iji
'n
1XI, Z"M
u~

22426
S/049V61/000/002/004/012
D242/ 301
The piezoelectric-source..O.
'(a), second
:Fi 1. First
M and third.(c) modes
of oscillation of a 450
Z-c-ut ADP plate. - at
L
re st, plate in
oscillation
-6
(Djtr. 1. neptian (a), Bvipant6) it Tpurbit (e) xoAm xoneGainift iiiiacminj
4 7-cpo3a ADP
zinactnua n. noitoe; x.oneoniotgaaca nancTutta
show that the pile-of plates can.be excited'in such a way that the
second and third modes~are absent and its oscillations consist of
a pure-first.mode. the-way to do.this is shown to.be firstly to
use a scItiard electric.pulse.shorter.than the period.of..the'third
.mod6 so that it is.not excited. 'Secondly,.to prevent oscillations.
of one edge. by the. method of f ixing: so. that, since this is. a nodal
Card 4/6
rgm ~'p
!:z"O"~" '4;. . . .
5UP, 1MR- An -1-~'-Qm-itg

9/049/61/000/002/001;/0121
D242/ "301
The piez,oalectiic, source..,.
line f or -- the f irst, mode. and an.. antinodal. line f or. the second mode
n the.device is.lozxded,by e.t.
only.the first.mode is excited* Whe
a seismic model,,the.frequency,*3's brought doi-m to about 50 kc/s.
lqvlono6hromatizingl *'.end plates still.further alternate any residual
secand-m9de. An.analysis is given of.the.behavior.of.such an
P
oscillator as,afunction of.the duration.of.the e-citing pulse
which.could be.found in.mar~y.text-books,and.this leads to the
conclusion stated.. The.construction.,is..illtistrated in-detail in
Fig.' 6. There.are.9.figures,and.5,rdferences.:.4-Soviet-bloc and
I non-Soviet-bloc...The.reference.to.the-English-language publica-
-H. r Ic
tion reads. as-f ollows: . 1,:stein,.,Free-vibrations.of..-anisotropI
bodies. Phys. R4v.,A6'~ 1944..'
-ASSOCIATION: Mos vskiy,gosudars tvennyy,-universitet im. 11. V. Lomo-
nosivoa. .(Mosc.ow State Univo-rsity im. M'. V..Lomonosov)
SUBMITT.rD: July.115, 1960
Card 5 6'
A
I)L
F7
IS MF
K-N,
NO IM
P-
4~,M M
I E
- ".3m.
MR M53~11 Z`6 vn,*WM~~ VI) I--
P9

24218
C71 S/049/61/000/003/003/005
-3 a D249/D301
AUTHOR: Feofilaktov, V.D.
TITIM: -An instrumental determination of the energy of seismic
waves
PFMODICAL: Akademiya nauk SSSR. Seriya geofizicheskaya Izvestiya,
no. 3, 1961t 412-417
TM: The author describes the experimental techniques of measuring the
energy of earthquakes and gives the results obtained since June 1959
by means of a three component seismic energy meter, described by V. L.
Belotelov, N.V. Veshnyakov and I.I. Zhilyayev (Ref. 1: Izv. AN SSSRI
ser geofiz., no. 4, 1959) and installed at the seismic station of Moscow
State University. The meter is a velocity meter with galvanometric
square-law recording on a moving film. The energy record is a trans-
parent trace on the film, whose varying width is proportional to the
square of the velocity of seismic oscillations of the earth's crust;
the transparent area within the trabe is a time integral of the square
Card 1/5

24218
S/049/61/000/003/003/005
An instrunental determination.*. D249/D301
of the velocity. The s~fibsltivity and the frequency characteristics of
the energy meter were deduced from carefully measured instrumental con-
stants. These characteristics (Fig, 1) were checked by vibrating the
meter pendulum on a special platform. The calculated and experimentally
determined characteristics agreed within 5%; this means that the error
in determining the square velocity was not greater than 10%.. The energy
meter was not used continuously; the following automatic device was used
to switch-on the meter at the beginning of an earthquake: a monitoring
beam (produced by a lamp kept on day and night) wa&reflected from the
galvanometer mirror and fell onto a photoresistor _, FSK-M). A dia-
KM
phragm image was focussed on this photoresistor. In the absence of vi-
brations the working part of the photoresistor lay in the shadow of the
diaphragm's central opaque strip. The width of this strip governed the
threshold value of the vibrations necessary to trigger-off the instrumento-
When the vibrations were sufficient to move the central opaque strip so
that some part of the photoresistor was illuminated, a triggering circuit
described by Belotelov et al. (Ref. 1: Op.cit.) came into operation.
Card 2/5

24218
S/049/61/000/003/003/005
An instrumental dbterminationooo D249/D301
The meter was triggered when the earthquake vibrations reached a velo-
city of 7-10A/sec. which corresponded to displacements of 5-71L for
volurae waves with a period of 4 see. To establish the time at which the
energy meter was switched on, the triggering circuit superimposed time
marlus on the film (these marks were produced by a separate small lamp
which flabhed once every minute)# The transparent areas Q, of the re~
cords were measured with a planimeterm-21