SCIENTIFIC ABSTRACT KAPLYANSKIY, A.A. - KAPNIK, M.SH.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000720510012-3
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 13, 2000
• Sequence Number: 12
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

ACCESSION NR: AP4032065 S/0051/64/01G/004/0602/0614
U
AUT11OR: Xaplyanskiy, A.A.
TITIX--. Woncubic. centers in cubic crystals and piezospectroscopic investigation of
such centers
SOURCE: Optika i spolctroskopiya, v.16, no.4, 1964, 602-614
TOPIC TAGS: crystal lattice defect, cubic crystal, crystal structure, noncubic cer
ter, anisotropic center, orientational degeneracy, dipole transition, piezospectro-
scopic effect.
PBSTMICT: The present paper is a continuations and extension of earlier studios bi
the author and his as'sociates (numerous references are cited). It is devoted to c,
sideration of the properties and attributes of different noncubic (tetragonal, tr
gonal, orthorhombic (two types), monoclinic (two types), and triclinic) centers
that may form in cubic crystals. Such noncubic or anisotropic centers are essent
1y latticb detects and are characterized by different orientations (orientationa
degeneracy). A piezospectroscopic method for investigating such centers was proi
earlier by the author (Opt.i spektro.7,677,1959; Ibid. 10,165,1961; Izv.AN SSSR,
card 1/3

ACCESSION NR: AP4032865
fiz._45,20,1061). It is based on the fact that under compression (equivalent to re-
moval of orientntional degeneracy along the compression axis) the onerCy levels are
shifted differently in differently oriented centers with the result that the Spec-
tral bands (lines) of the conters,exhibit reversible splitting into several compo-
nents, each of which is associated with transitions in one or more groups of the
noncubic cantors with a given orientation relative to the compression axis. no
specific characteristics of the anisotropic centers that may give rise to the piezo-
spectroscopic effect are discussed. It is shown that there can form in cubic crys-
tals noncubic centers with five different kinds of symmetry (see above) that satis-
fy the requirements for appearance of the piezospectroscopic effect. The probable
effects of these different anisotropic centers are predicted. Selection rules are
given Tor dipole transitions in the noncubic groups. A final *table gives the re~-
sults of evaluation of the piezospectroscopic effect in cubic crystals with the dif-
.Moront species of noncubic centers under compression Along the [1003 , (111], and
flid] axes. Lastly, the possibility of the piezospoctroscopic effect being manifest-
ed in noricubic host crystals with orientationally degenerate centers is examined
briefly. Orig.art.has: 7 formulas, 2 figures and 3 tables.
-,(;Rr4 2/3

ACCESSION NR: AP4032865
ASSOCIATION- none
SUBITITrED: 18AprG3 DATE ACIQ: OMY64 ELICL; 00
SUB CODE: SS NR P" BOV: 010 0MR; 0051
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AccuSION Nil- AP4032866 S/0051/64/OIG/004/0619/0627
AUMIOR: Kaplyanskiy, A.A.; Moskvin, N.A.; Fcofilov, P.R.
TITIZ: Investigation of the electric and mngnotic series in the luminescence spCc-
t-tra of alkali fluorides activated by hoxavn1ant uranium
SOURCE: Optika i spektroskopiya, v.16, no.4, 1964, 619-627
TOPIC TAGS: luminescence Epectrumi, polarized luminescence', luminescence .center, le-
vel diagram, luminescence temperature, uranium activated lithium fluoride, uranium
activated sodium fluoride, uranium 6+
:.ABSTRACT.- The present study is a continuation of "vestigntions of the electric
and magnetic series of lines and bnnds in the luminescence spectra of LiF and NaF
crystals activated by hexavalent uranium. A number ot earlier studies by the auth-
orn and other non--SoViet experimenters are referred to and discuBsed. The crystnls
wore grown at the Institute of Crystallogxaphy of the Academy of Sciences 555H.
Most of the measurements were performed on NaF:UC*'I* crystals, in the spectrum of
which the series are more clearly pronounced, but the principal inferences apply to
LiF:U crystals an well, The measurements (mostly at liquid-nitrogen temperature) in-

ACCESSION NR: AP4032866
J
.cluded determination of the degree of polarization P of the luminescence as a func-;
tion of the, wavelength of the exciting lightthexcit, There was established qualitn-
tive mirror symmetry of the P versus %excit curves for the electric and the magne-
tic series, which is interpreted as indicatilng that the same or common centers are
responsible for the electric and magnetic dipole series. Also studied were the in-
tensity distributions in the electronic -vibrn, t iona 1 (vibronic) series (the observed
lidistributions agree with the predictions of theory) and the temperature dependence
F of the luminescence spectra of LiF: U and N-W: U. sn incmss in temperature in the range
i: -from liq'uid nitrogen to about 3500K results :In a shift of the electric and magnetic
luminescence spectra (lines) to the long wavelength side; the shifts are npproxima-I
toly the same for most lines, but a few lines appear to be more temperature sonsi'
tive". The temperature shift is associated ,dth a change in the lattice parameters
d Mar
with heating. Level diagrams for the luminescence centers in LiF.-U an :U,,based
-i'on the results of the temperature variation measurements and other data, are pro-
sented. Curves are given for the temperature dependences of the intensities of the
hand bands of the electric and magnetic series; the intensity of the former in-
creases with rising temperature; that of the latter falls off..A value of approxi-
'i-matoly 103 is adduced for the ratio of tho'probabilities for electric and magnetic
transitions. SUperf1cial slmllnrit~es between the levels and transitions in the in-
vestigated crystals and in MeFsSm2r (where Me = Sr or Ba) are noted. Orig. art.
6 fivres., 5 formulang and I table!-.-.

;,ACCESSION NR*- AP4032866
ASSOCIATION: none
SUBMITTEDt 21junG3
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ATD PMS: 3081
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tv ACCESSION NR: AP4039707 S/0051/64/016/006/1031/1044
q.1
AUTHOR: Xap1yanskiy,_A.,.A,_,
TITLE: Computation of deformation splitting of spectral transitions
iv
in cubic crystals
!~-'SOURC!Es -0ptika i spektroskopiya, v. 16f no. 6, 1964f'1031-1044
~,ITOPIC TAGS: level transition, band spectrum,'band,oplitting, cubic
crystal, deformation splittiW
ABSTRACT: The deformation splitting of the bands correspondi*ng to
!all the possible allowed electric and magnetic transitions between
'the 0 and T a.
h d levels of the crysialline field are analyzed by
:group-theoretical meti%od, which makes it possible to obtain the num-1
;ber of the splitting components and establish their polarization.
L
it-The calculations are then repeated using perturbation theory, which

,~ACCESSION NR: AP4039707
~~'makes it.possible ih addition to determine the distances between com-!
ponents and the degree of polarization of the splitting components.
In'addit-ion, transitions are considered which-are forbidden in a cubic
''!field but are allowed in th-a case of deformation distortion of the
:cubic symmetry of.the field. It is shown that the splitting of.ex-
.citon bands has been interpreted*.in the literature in two %~ays~;
.1'~"The author is grateful to G. L. Bir for useful advice and discus-!.
,. Is.:.. 21'
.!;sions.11 Orig. art. has-: i2 formulas and 5 tables.
'ASSOCIATION: None
IISUBMITTED:- l8Apr63. DATE A.CQ: 24jun64 ENCLt- 00
"SUB CODE:' OP NR REP SOV: 012
OTHERs 012

5026095 SOURCE CODE: UR/0386/65/002/005/0209/02.12 I
AUTHOR: j~plyan a edvedevj V. B.
A. A.;, 14
ORG: Pbysicotechnical in;tWiWe"Iva. A. F. 1offe,_AN SRI% 1,eningrad (Fiziko-
tekhnicheskly inst.itut AN SSSR)-_
TITLE: Pseudo-m Stark splittiq; of the 4f 5d lines Pf Ce-'4 Ions in CaF2 crystals
BMCE: Zhurnal eksperimenta'llnoy I teoreticheskoy fiziki. Pissma v redaktsiyu.
(Prilozheniye), v. 2j. no. 5., 'jp65.,- 209-2y-,,-And insert, side B., between p. 238 and 239
TOPIC TAGS: calcium fluoriidde'~ I 'pi, T",
p Stark effeetp line splitting, UV spectrum, electron
transition
ABSTRACT: 7his 16 a continuation of earlier work (Optika I spektroskopiya v. 14, 6640
1963 and v. 18, 803, jL965), end is devot eil to observO, )n of-linear pseudo-Stax-I&
splitting of the 4f - 5d bands In the ultraviolet absbX Gpectr of the cubic
crystalB of We with Cest. The Iauthors Investigated primarily CaFn-Ce 3+ crystals,
In which the Ce3+ are in a local field of trigonal w1mmetry, and studied the Influ-
enee of the electric field at 4.2K on narrow long-utave lines, the 3383.6 A absorption
3+
line and the neighboring weak 3383 .0 1 line of CaY -Ce I corresponding to pure elec-
tronic transitions from the ground.sublevel 2 F5/2(G) to the lowest crystalline sub-
levels of the 5d state of CO~". The static field vas applied to single-crystal sam-
pies along the (11.11 axis; the, spectra -were observed in the directions perpendicular'
and parallel to the field. Jt was established that in an electric field the 3383.6

Coydsk

L L0031-65 Ewr(i)
T-' GrOSE I e Xar, I &nr. ~A, A ~.
indirer~t excitons &r)d phonan Spectrum I~t cu-0-
2
,OURCE: Rizika tverdogo tels., Y. 7, no- 3, 1965, 781-787
rOFIC 1AGS: rol's u-'iep, O)CM(In spectrum, indirect exciton, unlaxia."
r
single cr~ stai ,absoT-ption Ertep, compression splitting
,ABS-MRAC';-. C-untLnauation of earlier studies V.
(
thers) devoted to the Influe"ce of lnelL~ic imiaxial ca*ressicm de:fv
~'erten-,r of t1he exciton :-,p e,--,
C"20. Trip wimpies w-er.
C ng one of the princip--.1 cr-ye-a' 1
the Qampressior %i-aB - 74.1~ kg /;~ff2 alo
tions ~100~, /\Lll>, or The apectrum was phortographed wl*.L a
W'rhp.'~ w~tl~ a S-Iag- gy-:Zt~=- An earilsotro-pic reversible
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L h9031-65
jACCWSION NR: AP5006831
was observed upon deformation. rhe properties of deformation splitting hare nade
it possible to establish that the absorption in the step is due to ind-irec'
tions to th~, nrincipki Is-e-xcitcn band Of CU20 producing phonons --dth h C~- -
ha,3: I figure, I
e g, V i n;.ft itut in- A. F, Iaffe AJ)
9UBNU=.- 15Aug64 MMI 00 MP C-= I OP, 89
IM MW 8,MS 010 is 'gilt-
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T --I" C
IT
77777717 1~11; T-,
AUTHORS: Kaplyanakly, A. A.; Medvedev. V. N.
TTITLE: Fiezospectroscopic determination of the
crvstallinr- fic-1-11 ict'Ln;- cn triply charzP-1 rntr;-
TOPIC TAGS: calcl-,..rn f'!-,-jcrjde, pressure eflec,.i
ABSTRACT: The authors investigated experimentally at 4.2K 11-~-
fluence of J e f-ma'. n -f dr, 1,9.x !a 1 c omp re c f, 1.)nn
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NINO, M, ~"V Q- MN"'ON
03513101~' BE Min. 0-
MEN

ACCESSION NR: AF,012606
in CaF- and to determine -.heir synmietry. 7T., e
F; nme r -1 M i
us~o~ f,,~r 4hr-
us P1 In th~- n. rF~ work, was developed and
a VI qROOM=
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L 64469-65
ACCESSION NR: Ap5olnC618

F, parallel t o F
ric"-u--e observed at are irl

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i- 64469-~5
ACCESSION NR: A 2- (- I
ters in dafc)rTnie'i Orlp. a,-'.- ria-
ASSo=A7---'
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77
,,ACCESSION NR: AP5019843 UR/0181/65/007/008/2327/2329 9"6;
:1AUTHORS: Kaplyan6kiy, _A..-A,;---Suslina,.L. G. qqj~6
'TITLE: Deformation splitting of,the fundamental exciton line 'n the
Meflection spectrum of ZnTe
SOURCE: Fizika tverdogo tela v. 7, no. 8, 1965, 2327-2329
TOPIC TAGS: zinc, telluride~lconduction band, valence band, exciton,
.i
jine splitting, er ~stal~deformatlon
~IABSTRACT: In order to explain the properties of the lower conduction
:band and the upper valence band of ZnTe, between which an exciton
.state Is produced, the authors investigated the influence exerted by
0
'directional deformation of-tbe crystal on the 5236 A (2-3675 ev) line.1
~To this end, the splitting.of this narrow exciton line was measured
i -
lin single crystals of-ZnTe., subject,to elastic uniaxial compression
Along the