SCIENTIFIC ABSTRACT IPATOVA, G.F. - IPEKDZHIYAN, V.M.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000518720019-8
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: July 27, 2000
• Sequence Number: 19
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT


KOLONINA, N.P,,, KUBAREVAO N*Io; IPATOVA, G.N.
Ion exchange method of removing copper from nickel and cobalt
chloride electrolytes. TSvet. met. 38 no*9:,43-44 S 165o
(MIRA 18: U)
M

IIIATIVAI I. P.
IPATOVA '. I. P "On the Power Spectrum of IFxiton' in an Ionic Cr7s-
tal." 'i~ningrad Order of Lenin State U imeni A. A. Zhdanov. Len-
ingrad, 1955. (Dissertation for the Degree of Candidate in
Physicomathematical Sciences)
SO: Knizhnaya Letopis',, No 1, 1956, pp 102-122, 124

P/?-) 6y)9 P
-SUBJECT US= / PHYSICS CARD I / 2 PA - 1036
TITLE On the Theory of Exitons in, Ion Crystals.
:PERIODICAL furno~teohiafis, 961 fasc.121 '2786-2788 (1956)
jasued: '~ Vj 19~
In thia.work the method of interconnection developed by LEEp LOW and Pins was
employedfor the purpose-o *faetermining the exiton spectrum. The method takes
account of the oscillations of.-,theionaf but it In useless in the case of higher
values of the connection constant. The HAMILTONIAN of the system is written
down. As the full momentum of the system is obtained, it is better to work on
the assumption of a diagonal momentum. Transition takes place with the help,of
canonical transformation, whereby the coordinate R of the center of mass is re-
moved from the HAMILTONIAN. Computations are carried out for Cu 20 and results for
the various m and m values are shown in a table. (m and m are the effective
1 2 1 2
masses of the electron and the hole respectively). Computations carried out b
the authoress disclosed the existence of the ever-polarizing exiton (at m
The energy of the exiton-levole depandq,according to the authoress, riot only on
the ratio of the effective masses, but also on the individual values of mi and m 2-
Computations allow some conclusions to be drawn as to the exiton spectrum as a
W327 whole. At m, a2 the exiton spectrum will differ in two respects from the

4 pA 2349

AuTHORi IPATOVkJ.P. '0b
-fFe--3ffUU Spectrum of an Exiton in an Ion Crystal* (
-W

TITLEs n
-
re eksitona v jonnom kristalle, Russian) _.6
energeticheSkOM spekt
78
I
PERIODICALt t pp
, 1957, Vol 21, Nr
Izvestija Akad.Nauk SSSR, Ser. Fiz-
(U.S.S.R.). Revieveds 5 0957
Received: 4 / 1957
lts with
teresting to coapare the already available reau
i
LBSTRACTs n
It was
btained by computing the energy spectrum Of an exiton in
th
ose o
f the ions with respect to the
of the oscillations 0
consideration
occasion it is
ions of the equilibrium. on this
shifted posit
CA's direct variation method which is
ossible to employ TOKONA
d
p
ge-ooupling". This metho
method of avera
ms Of "
n
th

e
a
known by
constant.
d for high values of the coupling
e
can, howeverg not be us
paper is arranged as follows'
The present mathematical
roximating
f the a
pp
) Selection o
1) The Hamiltonian of the system 2
t
state of the exitOn withou
function 3) Computation of the 2p

s
taking cOr-r lation into account- mass of the electr6no
(m
i
ionst in the case Of ml
m2
Ons
some 0 aclus
l
ss of the hole) energy has a single medium which corre-
m
m -
a
2 e existence of a polarizing exiton in the Cu2O Crystal-
sponds to th
. M 0 in accordance
.-I xist only in the case m
__ axitons e
2
l
.

26419
S/056/61/041/001/014 21
1/0
B102/B214
770()
'AUTHORS F.
1pat9va p I F.t Kazarinov, R.
'TITLE
itons
Faraday effect on exc
PBRIODICAI;: Zhurnal eksperimentallnoy iteoreticheskoy.fiziki,.v. 4
no. 10), 1961, 209-210
f
TEXT: This-piper gives a theoretical investigation of the rotaition:o
the plane of p6larization in the neighborhood of exciton absorption,11
thb angle of this rotation depends on the effective mass and the raaius
of the exciton. In the neighborhood.of the excitorl absorption-lin,'es
(correspondin' te) 'the rotation of t
g to the transition #to the p sta he
plane of-polarization (Faraday effect) may'be expected to be large.', IrC
is expressed by the component of
cubic crystals the aLigle of rotat!'on
the boundary vector Y lying in the H direction (Hifz): (-,&d/k)GZ/&'p
where d is the thickviess 6f the sample, S the dielectric constant
without magnetic field, and I the wavelength of light. is- 4etermined-,
by the asymmetric part of'the dielectric constant: Theref orei
CaA 1/4

26419
S/056/61/041/001/014/021
Faraday effect on excitonG B102/jB214-
nsists in the calculation of S (H t's excitons,
the problem oo For Mot

-.
only-transitions to the s-state are permitted, those to the p-state aAO
.
forbidden.,Sineet however, the a-state.'transitions show no Faraday
effect, the less intensive forbidden transitions are 'considered. For the
exciton conductivity one has:
elk
M
Y
where W is the frequency of light, -n-eff/214o, M the reduced'm'ass of the
exciton, W- the hydrogen-like energy~level,
y. the width of the exciton J .
,
n nm
line, m the magnetic quantl~m number,T, a tensor whose real part is.
...related with..the oso 11
i ator-force of-the transition and the imaginai
.
with the rotation of the plane of polarization:

K,

E is the minimum frequency of the transition to the ground state, K i atl
0
the.point in the momentum space corresponding ~o thib transition,*~"_,,
Card 2/4

AUTHORS;
TITLE:
S/161/62/004/0 013/010/041
B125/h1O2
GUrevich, L. 4., and
Absorption.of electromagnetic waves by homeopolar crystals
-PERIODICAL: Fizika tverdogo tela, v. 4, no. 8, 1962, 2o65-2074
TOCT; When temperatures'are much lower than those of the forbidden band
width-~~ the photons absorbed by non-degenerate semiconductors or
.dielectrics are.assumed to excite an electron from the filled band into
the conduction band. When this electron is deexcited, it'emitls one or
several phonons. The temperature T must be high enough to ensure that
there is no appreoiable a6orption by free carriers. 'The emission o' a
single opticai resonance phonon by an electron causes a resonance ab-soro-
tion at one of the optical threshold frequencies. As the ale ct tromagaqt ic.e
waves are transverse, this absorption Occurs only in non-cu~ic crystais
and only in directions other than the main tensor axes of polarizability.
In.two-*onon absorption two.phonons are formed, havdng the raomenta ) and
q
k-q v -Lq of the two vibration branches t and tt with the frequencies
and 63 4 +NQ + From the transition probability
Wt tlk-q tiq
,Card 1/3 .
------ ------ -

S/18 62/CO4/008/010/b4l
Absorption of electromagnstic B125XB102
tt,
71 (2n/fi') 2:'f d'qjV,t.(~)j' 6(ci -vt,->) with V q) -M (q-,),E
ttt lot q q tt
for the real part:
Ile d3q[M"'(q)M"'(q)-t-~M"'(q)M"'(q)]X
"*"J $L 1 (2-7)
)< Wj"
With t t' only phorions from different branches can take part in t-he
absorption. The finite width of the absorption line in non-cubin crystals
is due to the anharmonic phonon. interaction. With T4 hjQ (where LL) iS
0 0
.the frequency in the atomic mass system) the band car. be divided iato a
virtually ompty and a filled band. The peak of resonance absorption is
much more intense than the background of continuous absorption. Non-
resonance absorption is due to many-phonon interactions with the lattice
vibrations,,but mainly to two-phonon interactions. For crystals with
inversion oenter-in the unit cell the selection ruled of the V'e
I qualitat'
thoory apply an4 the tallowing oxyreisione govern the order or.qaanituda
of the absorption coefficients:
Card 2/3

s/1 81 /62/004/0013/010/041
Absorption of electromagnetic B125/B102
cx C~! A4 (6-7) and
00
Re e E, )4
A4
2-
where E 1 and E 2 denote the real components of the electromagnetic field.
For germanium M - 1.6-10- 22 19) 'JOI(I-3-1-7)-1013 sec- I and a--~3'10 a CM.
Hence is /-~(l -2) .10-2 . There are 5 figures.
ASSOCIATION: Fiziko-tekhnioheskiy institut im. A. F. lof-fe AN SSSR,
Leningrad (Physicotechnical Institute imeni A. P. loffe AS
USSR, Leningrad)
SUBMITTED: March 8, 1962
Card 3/3
---- ----- ---
------------

10372
S/056/62/043/005/033/058-
B102/BI04
AUTHORSj Ipatova, I. P., Eliashberg, G. M.
TITLEs Spin waves and paramagnetic relaxation in a Fermi fluid
PERIODICALI Zhurnal eksperim6ntalOnoy i tecreticheekoy fisikil V, 431
no- 500~ 1962j 1795 - 1803
WhXMI The temperature dependence of the paramagnetic relaxation time of
liquid He3 is investigated only at T> 1 0K (Phys. Rev. 115, 1478, 1959)
where the effects of degeneracy are still so small that the classical
theory can be applied. At T