SCIENTIFIC ABSTRACT SEPTILICI, R. - SERAFIMOV, K .

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001547930009-3
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 9, 2001
• Sequence Number: 9
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

The 1.i ni L"J, c:i t ion staf~.--~ oi.* tclerance ot:ind--Ards in socialist countries. p. 148.
'oxisiiine-3 de Stand,-,r:lizare. Eucuresti, Ri-rnania
Val. 11, no. 3, 1, r. Y59
Monthl~y List of EaOt Suropean Accessions L-:,,, 8, no. 9, Sept. 19_;19
Uncl.

". , , ,I 1~
- SEPTILIC14--g., conf. ing. , -4""
New works regarding surface roughness. Metrologia apl 9 no.1:1-7
Ja-F 162.

SEPTILIGI. Raul. I
Standardization of the new -metric threads. Yletalur-g-i-a constr Mas
14 no.7:639-642 Jl 162.
1. Oficiul de stat pentru standarde.

SEPTILICI. R.,-, coaf . ing.
Characteristics of optical glass for measuring devices. Metrologia
apl 10 no.2:58-62 F 163.

~ SEPTILICIP R~yal, ing.
Standardization of the trapezoid acme screw threads.
Conotr nas 15 no.7498-502 J1163.
1. Oficiul de stat pentru standarde.

SEPTILICI, R.J. conf. ing.
Present problems in the soicalist caLmtries on t1he dimen-
sional interebangeability. Metrologia apl 9 no. 1+:145-148
JI-Ag 162.

SEPTILICI,R., con-f. _irlgg.
Characteristics of op~ measuring apparatus. Meturologia
Ile
apl 10 no.801346-350 Ag63.

SEPTILIGI, R. conf. ing.
,- ... -- -, , I
The E system for surface rugosity evaluation. Metrologia
apl 11 no. 4: 145-149 Ap 164.

SEPTILICI, H., conf. ing.; '1*11E'S.,~%, L., inC,
Tenniometry. Metrolog-la Ipl 22 ncj.2:6.---/;;j F '65j.

TEPTILICI, R., conf. ing.
The ISO/R 286 recour-endation; llljl,~e I.SC systern of tolerances
and fittings." Metrolcgia apl 12 no.4:157-163 Ap 165.

SEPTORA.. M.
-Z --------
Technoscientific sessions at the regional branch of the Scientific
Association of Engineers and Technicians of Rumania, Banat;
Section of ChemistIV. Rev chimie Min petr 12 no.11:685 N 161.

GUKASYM, E.I.; SEPYAN, G. Kh.
Case of a secondary calculus following ar adenomectomy. Azerb.
med. zhur. 41 no. 10t74-75 0 164 (MIPA 19:1)
1. Tz khirurgicheakogo otdeleniya ( zav. - G. Kh. Sepyan) Ste-
panakertskoy oblastnoy bollnitsy (glavnyy vrach - A.N'. 7argarcrr).

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so I 514-r. Foundry Practice, (In C~Z,
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dixers. Moves. etc.
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SEQUENS, J. , inz.-,,---dr..--.,
Electric drive of machine tools in Ger-n firm AEG. El tech
obzor 50 no.12:69,7-698 D :d.

ACCESSION NR: AP4042353 Z/0050/64/000/007/0010/0010
AUTHOR: Kubec, V. (Engineer, Candidate of sciences); Sequens, J.
...........
(Doctor, En,gineer); Vasko, A. (Engineer)
-TI TLE: Magnetic fields made visible
SOURCZ: Bulletin Ceskoslovenske akadamie ved, no. 7, 1964P 10
TOPIC TAGS: magnetic field, weak magnetic field, magnetic.field
visualization
ABSTRACT: In a previous study conducted at Che Ustav pr6 elekcrotech-,
niku, CSAV (Institute of Electrical Engineering, CSAV), temperature
D
fields had been made visible (CSAV Buile.tin, no. 3, 1963). Uiing the:
experience gained, scientists developed a new method of making mag-
netic fields visible by means of a polariscope. The method is based
on the Majorana effect (a colloidal solution consisting of fe-rromag-
netic particles becomes doubly refracting in a magnetic field which
is perpendicular to the optical axis of polarized light). A thin lay-
er of magnetooptic liquid illuminated by polarized light is placed in
a magnetic field, whose image can then be seen on the screen of a~
Card

ACCESSION NR; AP4042353
polariscope. A colloidal solution or magnetite prepared at the
Fyzik.alni ~istav, CSAV (Institute of Physics, CSAV) was used. This so-
lution aids in visualizing relatively weak dispersed magnetic fields
~(e.g., around the winding of-electric machines), mainly in cases when
,it would be difficult to calculate their shape. The inventors of the
,method are V. Kubec, and J. Sequens of the Electroxechnical Institute,
ICSAV, and A. Vasko, of the Ustav radiotechniky a elektroniky CSAV
:(Insticute of Radio Engineering and Electronics, CSAV). A patent.has-
been applied for.
ASSOCIATION: none
SUBMITTED: 00 ATD PRESS: 3053 ENCL: 00
SUB CODE: EM NO REF SOV: 000 OTHER: 000
Ccrd 2/2

,KOWUM, Vladimir., inz., kandidat technickych ved; SEQUFXS. Jiri inz.
dr.; SCHIER,-Pavel,, inz.
Dynamic stress of electricity conducting materials. El tech obzor
51 no.10:513-519 0 162.
1. VyzkLmny ustav kovu, Panenske Brezany (for Komarek). 2. Ustav
pro elektrotechniku, Ceskoslovenska, akademie ved, Praha (for Sequens).
3. Ifutnicky ustav, Ceskcslovenska akademie ved., Praha (for Schier).

17-1f,10-1 Gf -1116-~~f-,t I mean s c f t he Ma -foran ef, :4.
LE-ch

ei m Lra t,, hr
i ri n-
33 1
Fra& ie lf;b~- I'R
~2 -'r,adqi of, SAences, Prag-Lia I-Novt~-
i L, 37 , Va - 'j i v Z. k: n, i i ~u e r., c, Su~Aittpd 1-1,iy 10, 19-3.

T. -3-3206-66 nIP( w/T /FWP( t. 4RTT TJ P.1n
gr SOURCE CODE: CZ/0017/65/054/012/0591/0595
AU_ NKt AIW23827
L AUTHOR: Sep 5
en (Doctor of engineering)
ORG: Institute of Electrical Engineering,, CSAV _(Ustav pro elektrotechniku'ZSAV)
TITLE: Utilization of mechanically stressed current-carrying materials at higher
:,temperatures
SOURCE: Elektrotechnicky obzor, v. 54, no* 12v 1965t 591-595
-,'~,.TOPIC TAGS: mechanical stress, creep,, current carrier, dynamic stress, heat stress,
mechanical heat treatment
ABSTRACT: iThis paper presents the results of complex mec'h-
anical to'sts of the materials SAII~VUK 33 Es Jareal, ECul ECuAg
subjected to sta c and dynamic stresses at temporabures up to
:2300C9 includingicreep-resistance tests. The influence of the
coding mochaniE-al and heat treatment of the materials is in-
pro
-vestigated. Reference data for designers are given, as well as
:the possibilities of improving the required properties by preced..;
.7..ing moderate forming, and, finally, data are presented for the
icarrect working of the materials during manufacture. The research!
:resulti'are utilized for more detailed standardiza-';ion and for
improvement of the current-carrying materials. ILRased on authorls Eng. abst.) ,P,,,r
SUB CME% 11 SUBM DATE: lWul64* ORIG REF: 018
C.'~ -'row

FITT~Qul-~ 17-, H.
Peak nerformance of AuEtrian electric machinery after the Second 'Forld War. p. 172
ET-,EKI-MOT7CHNICYY 0,9ZOPI. (Yinisterstvo tezkeho slk-rojirenst-vi a Ceskoslovenske
vedecka te,-hnicka spolecnost Dro elek-trotechnik--i pri Ceskoslovenska akademii
ved) Prallaa, Czechoslovakia. 7ol. L8, Ho. h, Apr. 1P59
Monthly List of ~-ast European 'I'ccessions (EEAI), L-V, Vol. E, INO. 7, July 1959
Uncl.

DIU-SKIC., Dragisa, dr inz.; - * ipl. inz.
Possibilities of concentrating the Blagodat and Podvirovi
lead and zinc ore deposits. Rudar glasnik no.3:17-27 163.
1. Nacelnik Odeljenja za metale Zavoda za R.!S (for Draskic).
2. Sef grupe za metale, -Z--vod za RMS I'lud. inst., Beograd
(for Ser).

o3sibilities of ths f o t. a t irin c a,- -)n
f-,oncu2ation of iron. m-lne-,,~--I~. 1-1;,;
1. Mirltng 13, r r?

LESIG., Dura, dr. inz., redo-vmi profdsor; SM., Filip, inz. . strucn-i sarad~aik
Industrial use of tetrabrom6ethane as a heavv medium in
mineral dressing processes. Rudar glasnik n0.4;98-103 162.
1. Rudarsko-geoloski fak-ultet Univerziteta u Beogradu,
upravnik Zavoda za pripremu mineralnih sirovina u
Rudarskom institutu, Beograd, i gl--vni urednik.,
"Rudarsici glasnik. Bulletin of Mines" (for Lesic).
2. Zavod za pripremu miin~E!ralnfh s-irovirz71- (fo.- Ser).

F
DM-,3-::~'7M.T.: SER~-;D.; S:R.Y,Z.? -HCIIZ7SA.--R.: K-L-EITIC'EK,
TAL;s
Contribution of simple marunograp!17 in the dilferE;--,'U-ial d-4a.-----ios--s
of dysplas-;a of the 'Lemale breast. Pozhl. chir. 43 no.5:42CS-2922
My * 64.
1. Ustrefti re-lit 1 gisky ustav (predr-ost : doc. dr. j.
.~erojo La
Doubravsky, CS,:; ; I . chirurgi~,ka klinika (prednosta,. doc.
dr. J.Eurian); patolog-,-'ckoana-~.-or-ickyuste:~r (prelnostpa: do.-~.
ch,. V.Valanh) a gynekologicka Idin--',ka (prednosta: doc, L%
F. Gazarek,, CSc.) lekarske fakulty FLI (Palack-eh-o
v 010--louci.

SERY, Z.~_SEPA,_.k.; FAJTA, M.; HOLUSA, R.; KAMENICEK, 0.; ROCEK, V.;
TALAS, M.
Breast dysplasia. Rozhl. chir. 43 no.5:273-277 My 164.
Clinical picture of breast dysplasia. Ibid.:283-287
Vaginal cytology and endometrial histology in breast
dysplasia. Ibid.:293-296
1. 11. chirurgicka klinika (prednosta: doe. dr. J. Burian);
ustredni rentgenologicky usfav (prednosta: doe. dr. J.
Doubravsky, CSc.), patolog!choanatomicky ustav (prednosta:
doe. dr. V. Valach), a gynekologicka klinika (prednosta: doe.
dr. F. Gazarek, Me.) lekarske fakulty PU (Palackeho university)
v Olomouci.

HOLUSA,R.; IIALACH, T.; SE,PY,Z.; Fl,.JTA,1,1.; KAI-ZTIGEK, 0.; ROCEK,V.;
TAUS.M.
Pathology of breast dysplasia. Roz-ha. chir. 43 no.5:278-282
MY'64 -
1. Patologickoanatomicky ustav (predrosta. doe. dr. V.I&la.--h);
Il. chilrurgicka klini-ka (prednosta. doe. dr. J.Darian); ustredni
re-ntgenologicsky usta-, (prednos-ila: doe. dr. j.Do-abravsk-y, CSf3.)
a gynekologicka klini-ka (prednrqta, doe. 1r, F.Gazarek, GSc.)
lellcarske 'Jakulty PU [ Palac-Iceho unlversit3 ] v Olomouci.

/I On.
GAVALLM, Istvan, 11r.; OROSZ, Etelka, Dr.; SERA, Ibolya, Dr.
Significance of eclampsia in damages of the fetal nervous system w#h
late manifestations. Orv. hetil. 99 no.1:16-19 5 Jan 58.
I
1. A Debreceni Orvostudomanyi Egyetem Szuleszeti es Ifogyogyaszati
Klinikajanak (igazgato: Arvay Sandor dr. egyet. tanar) es Ideg- es
Almegyogyaszati Klinikajanak (igazgatohelyettes: Rusz S6dor dr. egyet.
docens) kozlemenye.
(MIAMLk, compl.
fetal NS damages with late manifest. (Hun))
(73M, dis.
NS damages with late manifest. caused by eclampsia (Han))
(N:9RVOUS SISTIM, dis.
fetal NS damages with late manifest. caused by eclampsia
(Hun))

JuHksz. Pal, dr.; SEU, lbolyal dr.
Certain data on the problem of clinical therapy and pathology
of polioencephalitis haemorrhagica superior. Ideg.azemle 12
no.12:353-361 D '59.
1. Debreceni Orvostudomanyi Eg7etem IdeC. es elmegFoUaszati
klinikajanak (Igazgato: dr. Juhasz Pal egyetemi tanar)
kozlemez3,ve.
(VIT&MIN B MWICIEITCY)

SZRA, rholya, dr.; OSZWiSZKY, Otto, dr.
Hemiconvideive therapy. Ideg.szemle 13 no.2:61-64 1? 16o.
1. A Debreceni OrvostiAomanyi Egyetem Ideg. Elmeklinikajanak
kozlemen.ve (Igazgato:.Dr. Juhasz Pal egy. tanar).
(SHOCK THFJIA")

C, 1,L;j.-, ., IT.
Good example for the rest. p. 1',11.
I D T
.- .,A VL,'.3TlI., Praha, :~, Apr. 1955.
SO: Monthly List of ~;azt. ~-Iuropean Accessions, LC, 7ol. ~: , no. 1 ~ Oct, 10,55,
- I Lo U t,
uncl.

21520
7 S/139/61/000/002/015/018
2.4-2 1 E032/E414
AUTHORS: Serdyuk, V.V. and.Sera, T.Ya.
TITLE: Optical Absorption of Some Metal Impurities in the
Crystal Lattice of Cadtnium Sulphide
PERIODICAL: Izvestlya vysshikh uchebnykh zavedeniy, Fizika,
1961, No.2, PP-132-137
TEXT: Changes In the absorption spectrum of cadmium sulphide
films which are due to heat treatment and the introduction of-some
metal impurities have been investigated. Yellow non-luminescing
cadmium sulphide powder obtained by chemical methods was evaporated'
in a vacuum on to quartz plates. The films obtained'in this way
had a thickness of the order 5 X 10-4 mm which ensured that they
were sufficiently transparent in the region 400 to 700 MIL. The
absorption spectra were measured with the Ct -4 (SF-4) quartz
spectrophotometer. A thinner layer of cadmium sulphide was used
as the standard specimen. In this way possible errors due to
unequal reflection of light from the semiconducting film and from
quartz were excluded. Changes in the absorption spectra of
cadmium sulphide were determined after It was heated in a vacuum
for 20 minutes at 300*C. In addition, the effect of cadmium,
Card 1/6

21520
S/139/61/000/002/015/018
optical Absorption of E032/E414
silver and copper impurities on the absorption spectra was
investigated. The metal impurities were introduced by vacuum
evaporation and subsequent heating at 300 to 4000C. This operation
facilitated the diffusion of the metal into the semiconducting
material. The standard specimen was subjected to the same thermal
treatment as the specimen under investigation after the
introduction of the impurity. This ensured that only effects due
to the introduction of the metal impurity were observed, while
other possible effects due to heating were excluded. The
absorption spectrum of cadmium sulphide measured relative to the
thin standard before (curve 1) and after (curve 2) heating is
shown in Fig.l. As can be seen, the heating of the specimen in a
vacuum for 20 minutes at 3000C gives rise to the appearance of a
new band with a maximum at 490 m1i. This band also appears if the
heating is carried out in air. It is suggested that the new band
is associated with the appearance of surplus cadmium atoms in the
cadmium sulphur lattice. This is confirmed by the fact that the
band does not appear when the specimen is heated in a sulphur
atmosphere. Fig.2 shows the absorption of cadmium sulphide after
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21520
S/139/61/000/002/015/oi8
Optical Absorption of ... E032/E414
the introduction of the following metal impuritiesg Cd (curve 1),
Ag (curve 2) and Cu (curve 3). At was to be expected, the
introduction of cadmium gives rise to the appearance of a band in
the same region as in the case of heating. However, the two
methods of introducing cadmium atoms into the lattice are not
entirely equivalent since the position of the band in the second
case is 515 mTL as compared with 490 m)i in the previous case.
The addition of silver gives rise to an absorption band'with a
maximum at 550 mil while the band associated with the copper
impurity has a maximum at 600 mp. In these experimen s the
average impurity concentration was of the order of 10-i g/g~
Fig-3 shows the dependence of the absorpt on band due to silver on
the impurity concentration (curve 1 - 10-t g/g, curve 2 - 10-3 g/g,
curve 3 - 10-2 g/g). X slight displacement of the maximum toward:s
longer wavelengths is observed*at the higher concentrations.
Fig.4 shows the effect of cobalt (curve 1), nickel (curve 2) and
iron (curve 3) on the absorption spectrum. Definite absorption
minima are clearly present in these curves. The optical
absorption effects are closely related to photoconductivity and
Car-d- 3/6

21520
S/139/61/000/002/015/018
Optical Absorption of ... E032/E414
luminescence effects. Thus, for example, the absorption bands
associated with the introduction of copper and silver into the
cadmium sulphide lattice coincide in position with the
corresponding photo-conductivity maxima. This indicates that the
impurity centres are responsible both for absorption and photo-
conductivity, On the other hand, the introduction of cobalt9
nickel and iron does not give rise to selective absorption but, on
the contrary, leads to the appearance of characteristic absorption
minima. This is in agreement with the quenching action of these
impurities on the photoconductivity of cadmium sulphide. The
entire situation can be represented by the energy level diagram
shown in Fig-5 which is used to interpret the photoconductivity and
luminescence effects in activated cadmium sulphide crystals,
There are 5 figures and 11 references! 7 Soviet and 4 non-Soviet.
ASSOCIATION: Odesskiy gosunlversitet imeni loIol-fechnlkova
(Odessa State University imeni I.I.Mechnikov)
SUBMITTED: March 23, 1960 (initially)
November 10, 1960 (after revision)
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21520
S/139/61/000/002/015/018
Optical Absorption of ... E032/E414
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02
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400
500
F4g.l.
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Optical Absorption of ...
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Card 6/6
22,520
39/6!/cOO/CO2/015/018
-052/E414
Fig. 5.
�00 2.mjff
~O'M'Lr
40 300

SERA, T.Ya.; GUMEMM, A.G.
Effect of the silver sulfide additive on the absorption spectra
of silver halide emulsions sensitized by dyes at low temperatures.
Zhur.nauch. i prikl.fot i kin. 5 no-5:321-326 S-0 160.
(MIRA 13:12)
1. Institut fiziki gosudarstvennogo universiteta imeni I.I.Mechnikova,
Odessa.
(Photographic emulsions)

8313 7 C.,
S/051/60/009/003/009/011
'22 9201/9691
AUTHORS; 3 ira, T. Ya . and S verd I i k, V.V
-------------
TITLE: A Now Band in the Absorption Spectrum of Polyerjotallino Cadmium
Sulphido Layers
PERIODICAL: Optika i spolctroskopiya, 1960, Vol. 9, No. 3, pp. 407-409
TEXT- The authors studied the effect of heat treatment on the absorption
spectra of polycrystalline cadmium sulphido layers. Non-luminescont
bright-yellow cadmium sulphide powder was sublimated in vacuum onto glass.
plates. Layers produced in this -way were about 10-6 cm thick so that
interference did not affect absorption measurements. Absorption spectra
were recorded in the 400-600 m1i region with a quartz photoelectric spectro-
photometer SF-4- Before heat treatment the absorption spectrum had its
usual form (Figla). After heating in air for 5 min at 3000C a now -wide
band appeared with a maximum at 485 m1i (Fig 16). This band can be seen more
clearly in Fig 10 which represents subtraction of the curve a from the curve
in Fig. 1. The same band could be produced by heating in vacuo, i.e. it was
not due to interaction with atmospheric oxygen. Additional experiments
Card 1/2

83370
S /0 51/60/009/003/009/011
B201/2691
A New Band in the Absorption Spectrum of Polycrystallins, Cadmium Sulphide Layers
showed (Fig. 2) that the new band was not produced by structural changes during
heat treatment. It vas concludod that a now band originated as followa.
Heating caused local cracks -which could be seen with a microscope. Metal
atoms collected in these cracks producing centres responsible for the additional V(
absorption in the 430-540 m1i region with a maximum at 485 m1i. The now
absorption band -was accompanied by a sharp rise of the electrical resistance.
There are 2 figures and 8 references; 7 Soviet and 1 English.
SUBMITTED: August 11, 1959
Card ?1/2

SERDYLJK, V.V.; SERL, T.Ya.
Optical absorption by certain metallic impurities in the crystal lattice
of cadmium sulfide. Izv.vys.ucheb.zav.; fiz. nb.2:132-137 161.
(PaRk 14:7)
1. Odesskiy gosudarstvennyy universitet imeni I.I.Mechnikova.
(Cadmium sulfide crystals-Optical properties)

S/06 6210001009/02 1/075
B158Y,3101
AUTHORS: Gumenyuk, A. G., Sera, T. !:a., Stasenko, A. G.
TITLE. The absorotion spectrum of silver halide..'Vxposed to mono-
chrom.atic light
PERIODICAL: Referativnyy zhurnal. Khimiya, no. 9, 19~62, 76, abstract
93524 (Nauchn. yezhegodnik. Odessk. un-t.-.Fiz,matem. fak. i
IT.-i. in-t fiz., no. 2, Odessa, 1961, 157 158)
TEM: The absorption spectrum of a fine-grain AgCl emulsion ex osed to
p
monochromatic light of 313, 33", 405 and 436 mp, Vas studied. This wa:~
0
found to be little d:ependent on ~, of the acting light. The same bands
were observed in it as for emulsions exposed to full radiation from a Hg
lamp. The positions of the band maxima lying in the s4Qrt wave region of
'the so'ec"trum completely coincided, whereas the maximum 'of the band in the
lon.- wave reSion was somewhat displaced towards long )~.- Preparations of
AgBr dust, in contrast to emulsion layers, often show areas with "'inverted"
-spectral curves (Sera, T. Ya., Sb. Fiz.-matem. fak-ta OGU, 1951). 1. Ab-
stracter's note; Complete translation.3
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7 7
AUTHORS: Slira, T. Ya.,'Serdyuk, V. V.
S,/YA1621000100 4/0 45/16 0
A058/A1O1
TITLE: Effect of preheating and extra irradiation on the absorption spectra
of cadmium sulfide and cadmium selenide
PERIODICAL: Referativnyy zhurnal, Fizika, no, 4, 1962, 33, abstract lIV242
"'Nauchn. yezhegodnik Odessk, un-t. Fiz.-matem. fak. I N.-i. in-t
fiz." no. 2, Odessa, 1961, i87-i9o)
T,EXT: The change in the absorption spectra of polycrystalline CdS and CdSe
films under the action of heat treatment and short-wave irradiation was investi-
gated, Thin fi'mS of CdS and CdSe 5 to 10-3
I of different thicknesses (from 10-
mm) were used. which were applied by thermal evaporation in a vacuum onto quartz
and glass backings. Heat treatment of the films was ef-leated by preheating
0
'hem in a vacuum at 300 C for 10 - 30 minutes. After such treatment of the cdS
film itsspectrum evinces an extra wide band with a maximum at 4,800 4,900 A,
which is associated with an excess of Cd atoms in the crystal lattice. A similar
effect is also observed in CdSe, in which a band appears at 6,900 A. Short-wave,
light with a wavelength in the range from 3,500 to 6,000 A causes "excitation" of,
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S/058/62/ow/004/045/,160
Effect of preheating and extra irradiation ... A058/Alol.
both CdS and CdSe thin films, which is manifested in the appeararree of extra
absorption bands in the red and infrared regions of the spectrum: CdS has
conspicuous bands at 6,700, 8,300 and 12,000 - 1~,000 A, and CdSe has bands
a-k,8,000, 12,000 and 15,000 A..
E. Nagayev
[Abstracter's note: Complete translation]
Card 2/2

SERDYUK, V.V.i-SERA, T.Ya.
- ---------
Some problems of the photoconductivity of polycrystalline samples
of cadmium selenide. Fiz.tver.tela 3 no.7:2166-2169 JI 161.
(INIIRA 14:8)
1. Odesskiy gosudarstvennyy universitet imeni, I.I.Mechnikova.
(Photoconductivity) (Jadmium selenide crystals)

T
30801
S/181/61/003/011/948/056
B104/B138

AUTHORS: S14 ra T. Ya., Serdyuk, V. V., and,Shevchenkof I. M.
TITLE: The effect of 1-irradiation on spectral distribution of
photo-sensitivity in CdS single crystals
PERIODICAL: Fizika tverdogo tela, v- 3, no. Ili 1961s 3537-3539

a
TEXT: The experiments were carried out on single crystals O:t-CdS with
.
photo-sensitivity spectrum with two maxima (Fig.). The.crysta-ls-~were.
exposed to a cobalt 60 milliroentgens radiation. Photoconductivity
decreased and the maxima vanished, but in most cases aIvery.. low'. level of
sensitivity remained through-the visible range of.the spectrum (Fig.-,,
curves 2 and
3). The variations in photo-sensi.tivity in CAS single
crystals due to y-irradiation were stAble. In essence',j the interaction of
a y-radiation with the atoms of single crystals is a Compton e-ffe'at which~
means there is bombardment of the substance with electrons, and multiple
ionization of the atoms. First the sulfur atoms are.ionized until they
become positively charged and are displaced to intersticial sites under
the action of the field of surrounding ions. A considerable number of
Card 1/2

30801-
S/I a 1,/61/063/011/048/056
The effect of 7-irradiation ... B104/B138 241_
negative ion. vacancies.are thereby-created, and impurity levels, are
formed in the forbidden band of the crystal, which play the role of
recombination levels for photo-electrons. There, arel figure and 7 refer-
ences: 3 Soviet and 4 non-Soviet.
ASSOCIATION: bdeSBkiy gosudarstvennyy universitet im. 1. 1.' Mechnikoval
(Odessa State University imeni I. I.-. Mechnikov)
SUBMITTED: May 15, 1961 (initially) July 14, 1961 (after revision)
04
-
Pig. The spectral distriVution
of the photo-cucrent of a CdS Q3 -
sing?e crystal.
Legend: (1) before irradiation;
(2) after a 24-hour irradiation;
.?2 -
(3) after a 46-hour irradiation.
0.1
Card 2/2

S/120/62/COOY001/041/061
4 0 B039/E520
AUTHORS: SUra, T.Y. and Stasenko, A.G.
TITLE; On the question of obtaining a I'vacuum creeping spark"
PERIODICAL: Pribory i tekhnika eksperimenta, no.1, 1962, 167-169
TEXCT: In the vacuum ultraviolet region of the spectrum a
number of different sources are used in spectral analysis. These
are: the normal gas discharge; high and low frequency gas
discharges; and contact sparks. The so-called "vacuum cr6eping
spark" comes in the last category and it consists of a spark
discharge over the surface of a dielectric or semiconductor between
two metal electrodes, the whole system being in a vacuum. A lower
voltage than that used urith the H.F. discharge is required. The
source described in this articles makes use of a standard candenser
spark generator /1P-2 or 3 (IG-2 or 3) (13 kV) as a power supply.
In order to obtain a stable discharge it isessential to have a
good contact between the electrodes and the dielectric. This is
done by forcing aluminium electrodes into the ends of a porcelain
tube of length 50 mm, internal diameter 10 mri and external
diameter 20 mm. A 10 mm diameter aperture is drilled in the side
Card 1/2

On the question of ...
S/120/62/000/001/041/061
E039/E520
of this tube perpendicular to its axis, thus exposing the gap
between the electrodes (about 1.5 mm). The electrodes are cut
in such a way that the discharge passes over the internal surface
of the procelain tube opposite to the aperture. The tube with
its electrodes is mounted on an insulated support inside a vacuum
chamber which is attached to a vacuum spectrograph. The voltage
to the electrodes is carried through high voltage vacuum seal
inserts and the position of the spark can be adjusted to lie on
the optical axis of the spectrograph. Part of a spectrogram
obtained using this source with aluminium electrodes is shown.
The spectrum was recorded on X-ray film sensitized with an
alcoholic solution of sodium salicylate using a A.O-C -6 (DFS-6)
spectrograph (exposure 90 min). This spectrograph was calibrated
over the range 500 to 2000 R using the source described. There
are 2 figures.
ASSOCIATION: Odesskiy gosudarstvennyy universitet
(Odessa State University)
SUBMITTED: 2161ay 15, 1961
Card 2/2

q -70,
'F
_4 14 , 5
<
1 Lz C; Z
~~i'~~_/62/004/004/0310/042
B102/B104
AUTHORS: Serdyuk, Y. It., and Sera, T. Ya.
TITLE: The photo-sensitivity and the infrared photo-
current ext-inction in cadmium sulfide single crystals
FERIC)DT~_-',L: Fizika tverdogo tela, v. 4, no. 4, 1962, 1032-1037
TEXT: The paper -ives addi-tional information (Cf. FrT, 2, 1229, 19611$
FTT, j, 115i, 1961) on 'the lon,--wave band of photosensitivity of heat.-
~reated CdS single crystals; the photoconductivity in the 520 m~L band is
U 6
compared with that in the '050 m~L band which arises in heat treatment.
The CdS crystals studied were grown by CdS powder sublimation in nitrogen
current. The initial samples had a photocurrent maximum at
~, = 510-520 m~,L, a weak band at 600-620 mK, and a dark conductivity of about
10 10 ohm-cm, which .vas reduced by heat treatment (5000C, 15-20 min), by
2-3 orders of magnitude. The spectrum of the annealed crystals showed a
band with 050-700 myu whose intensity increased with the annealing
max
period. The heating, which was carried out with focused solar light, did
Card 1/3

.'C z
04/004 01042
A
The lonE:-v;ave photo-sensitivity,... 3102/BI04
not only cause this long-wave band but also raised the total photo-
sensitivity of the crystals. In some cases, the intensity of the band 40
with X 1~20 m~L was after heating higher than before by more than one
-
lax
order of maE;nitude. This fact is attributed to the hole traps arising in
the forbidden band. The spectral distribution of the photocurrent'i�:-
not only red-shifted but also broadened and distorted' ahen the CaS

crystal is Eround and pressed (5 tons/cra2) to tablets. These changes are 45
due to the effect of the highly increased defect concentration. If the
crystals %,;ere heated and subsequently cooled, the photocurrent peak was
split into two components. The relaxation time (TO) of the photocurrent
increased with I, The coefficient 1.1 of infrared extinction was determined

as dependent on 'he Yavelength of excitinE light in the range 500-800 mit. 0
The curves T'(;0) and Q(~j are similar in shape: They both show a minor
maximum between 500 and 600 m~L, and then rise monotonically. If
a
/" E ,then the "quenching" illumination raises a; E is the
I
Phot
illum,ination intensity. With I exc ~ 520 mpL and ?L quench = 820 mLk, the
lu~-ampere characteriszics were studied. While log I
= f(log E
) is
exc
ph
Card 2/3

L ~3593-66 Fr(m)/EWP(t)/ET1 IJP(c) JD
ACC NR, AR016202 SOURCE CODE: un/oo58/65/o00/0ll/D035/DO35
AUTHORS: -Sera. T. Ya.; Stasenko, A. G.
TITLE: Absorption spectrum of CdS In the vacuum ultraviolet region
SOURCE: Ref. zh.*Fizika, Abe. 1ID270
roako t
REF SOURCE: Tr. Komis. po spekt pjL_AR S R 3, vyp. 1, 1964, 495-502
TOPIC TAGS: absorption spectrum, cadmium sulfide, uv band, opectrographic analysis
ABSTRACT: Results are presented of measurements of the absorption spectrum of CdS
in the vacuum ultraviolet region. The measurements were made with apparatus built
around a vacuum spectrograph with a radiation source consisting of a hydrogen dis-
charge tube with a capillary. The CdS aboorption was measured with thin films sub-
limated on single-crystal LiF plates. The absorption spectrum of these compounds
in the longer-wavelength region agrees with the data obtained by others. In the
short-wave part of the investigated vaccum ultr&violet region the absorption of vds
increases. (Translation of abstract]
SUB CODE., 20
1/1

SERA, T.Ya.; CHEMMSYUK, G.G.
Photoelectric properties of cadmium selenide s4,gle crystals sub-
jected to a gas discharge. Fiz. tver. tela-6 n6-.1:128-133 Ja 164.
(MIRA 17:2)
1. Odesskiy gosudarstvannyy universitet imeni Machnikova.

ACCESSION NR: AP4011749 S/0181/64/006/001/0128/0133
AUTHORS.- Sera, T. Ya.; Chemeiesyuk., G. G.
TITLE: The photoelectric properties of single crystals of cadmium selenide treated
~by gas discharge
:SOURCE: Fizika tverdogo tela, v. 6, no. 1,, 19642 128-133
TOPIC TAGS: photoelectric.,effect, cadmium selenide., cadmium selenide single
Crystal,, gas discharge.. photocurrent, spectral distribution, thermal conductivityp
fu~`damental absorption, photosensitivity, dark currentp extinction band, capture
cross section, hole, electron
-ABSTRACT: Measurements were made on single crystals of CdSe grown by recrystal-
:lization from the vapor phase. Ga or Ga-In alloy was used to obtain ohmic contactA~
:The spectral measurements were made with a DMR-4 double monochromator with quartz
:optics. Before treatment, the dark resistance, the spectral distribution of the
,photocurrent, the dependence of intrinsic time on wave length of incident ligh~i
,the spectral dependence of photoourrent yield, and the extinction of photoou~~nt
:were measured* The specimens were then subjected to a single treatment of gas
.Card 1/2

AccEssiox NR, AP4011749
discharge. After treatment., the same param eters were measured again. It has been
.shown that this treatment leads to a considerable increase in intrinsic time and in~
photocurrent yield in deep bands of fundamental absorption because of the marked
increase in photosensitivity of CdSe in this band. A large capture cross section i.
for holes results, and a small capture cross section for electrons. Recombination
0j- carriers at the surface is greatly diminished. The yield of electrons at room
teuLperature by neutral vacancies in So., f orrrdng by the gas-discharge treatment
leads to an increase in thermal conductivity. It was observed that the dark cur-
rent increased. A new extinction band of photocurrent was observed in the vicinity!
.0i 7300 A0. forming as a result of treatment on the surface of the crystal. "In
conclusion, the autbnrs express their thanks to V. N. Dulldiyer for making some of
',the measurements." Orig, art, has: 5 figurese
!A5SOCIATIOX: Od(;ilui~ gosudarstvenrq*y universitet im. 1, L. Meohnikova (Odessa
:State University)
'SUBMTED: 17Jul63 DATE xQ.- 3J4Feb64 ENCL: 00
:SUB CODE: PH No RXF SOV: 006 OTHER s 01D
i Card 2/2

e
AT
::Zr
-az
the'

-~20~8
-77-
ed aft
t
't:L46-
oc

bieitme'rit dei 6re,
i4ion- intOsitie-_ a I614,~be-'

GUMENYUK, A.G. (deceased]; SERA, T.Ya.; MAYSTRENKO, Ya.I.
Centers of photochemical coloring in a silver chloride emulsion
with gold additive occurring at low temperatures. Zhur.nauch.
i prikl.fot. i kin. 9 no.2:108-111 Mr-Ap 164. (MIRA 17:4)
1. Odesskiy gosudarstvennyy universitet imeni Me.chnikova.

SEIRA,. T.Ya~; STASENKO, A.G.
Ab;3orption spectri)xi in vacuum ultraviolet and l7h,:~ related electro-I
transitions in cadi;dum su2fide. Fiz. tver. tela 6 no.2.1.3361-3363
N 164. (MIRA
1. OdesskLy gosudarstvennyy wuversitet.

SERA, T.Ya.; CHERERMYUK, G.G.; DULIDIYER, V.N.
I
Negative photoconductivity of cadmium selenide single ,rystals
subjected to a gas discharge. Piz. tver. tela 6 no.12z;'7;4-3757
D 164 (MIRA L8s2)
1. Odesakiy gosudaretveanyy universitet imeni Mechnikova.

L 0936h-67 Neff (m) /EWP (t) /Or IIJP(c) JD/A
ACC NR1 AP6023421 SOURCE CODz:- U'1V013q1661o661oo31 -0-134 Tq-0-1-34"
tAU711013: /'Sera, T. Ya.) (doccased); Chemercayuk, G. G.; Dunayevskiy, V. 1.
ORG: Odessa State University im. 1. 1. Mcchnikov (Odcsrkiy gosuniversitct) q E_J
1TITIS: Influence of oxidatiJ"Of copper'~Iin the activation of polycrystalline cadmium
sclenide on the photoe-le-c-1-H-6 prop-erti-6-s-7of the latter
SOLMCE:
IVUZ. Fizika, no- 3, 1960", 13o-134
iTOPIC MGS: cadmium selenide, cuprous oxide, photoelectric property, activated crystal,
oxidation
i . - I
;1LBSTRACT: The authors studied the oxidation accompanyin.- the activation heat treatmen-6
!of CdSe powder produced by the "Krasnyy Ichimil1c." pla . The copper was introduced by
!several methods (sputtering, mixing of amorphous copper in the powder, treatment with
CuC12 solution) and heat treated at 550C in air for several hours. The photoconduciiv-
ity of both the activated CdSe and undoped CdSe used as a comparison standard, at wave-
lengths 500 - 900 nm obtained from a monochromtor, was determined. The standard CdSe
polycrystal had a photocurrent maximum near 725 nm, the same as single crystals. Ad-
dition of copper in solid form and heat treatment in air lowered the maximum wave-
length, the shift increasing with the copper density and with the duration of exposure
to the air. Heat treatment in a hydrogen atmosphere after oxidation produced a shift
~toward longer wavelengths. The results show that the decrease in maximum wavelength
!is due to the formation of cuprous oxide in the intercrystallite layers. The,cuprous
Card 1/2

L 09364-67
AtC N- R iAP6D23421
C)
oxide also reduces the photosensitivity appreciabky and decreases the relaxation time
of the samples. When the copper was introduced into the CdSe in the form of a CuC12.
solution, no cuprous oxide was formed after heat treatment in air, so that this pro-
cedure is recommended for CdSe activation. Orig. art. has: 6 figures.
SUB CODE -. 2o/ suBm DATE: o6oct64/ ORIG REF: 003/ ' OUI REF: oo6
Card 2/2
a

BRASOVAR, M.; V-42DAUTRANIJ, V.; SERACRI, E.; PRODAN, M.
Experimental studies on steering wheel control ir, a laboratory
installation. Bul St si Tehn Tim 7:197-205 162.

VAZDAUTEAITU, Vlad, ing.; SERACIN ~
Braking direct current electric traction equipment with
seria.1ly excited motors by recovery of energy. Rev transport
10 n0-5:223-230 YV 1612
~19

M
SERACIN, E.
Contributions to the use of simplified diagrams for calculating
electric operations with cont.acting rod reversing gear mechanism.
Bul St si Tehn Tim 9 no.1:197-205 Ja-Je f641.

SERACU, D,
From the experience of the Focsani Furniture Factory in
improving the quality of products and reducing the cost
price of furniture. Ind lemnului 15 no. 3:93-96 Mr 164.

SERADAY V. S.
SERADA, V. S. (Veterinarian, Training FamIUr-~evskola, Naro-Forminskil rayonY
0
Moscow oblast.) Experimental use of flavacridin and profflavin in diseases of whe
uterus in cows.
So: Veterinariya; Vol. 31; No. 1; January 195h; Uncl.
TABCON
0 0 0 0 0 0 0 0 49 9 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0,

T16, S,
A., inzh.; ERADSKIY, Yu., in2h.
Experimental unit for manufacturing swollen slag materials.
Stroi. mat. 4 no.2:20-21 F '58. (MIRA 11:2)
(Slag cement)

A153/AO20'
AUTHOR: Serafimov., A., Chief Eng_ine~-r-Inspector of the Board of the Avia-
on Engineering of the GUGVF
TITLE: From Mobile Mechanisms to Stationary Units
PERIODICAL. Grazhdanskaya aviatsiya, 1960, No. 10, pp. 16-17
TEXT: The author notes an increased complexity of ground servicing mo-
dern jet airliners,(e.g., about 17 special vehicles are required to service a
Tu-114 plane). This being so, the author recommends replacement of such special
vehicles on airfields having intensive air traffic by stationary facilities:
water pipelines, compressed air conduits, fuel supply lines, power lines, sew-
age ducts, etc. Such facilities should be consolidated into a "dock" with con-
crete surface, so that aircraft brought in there can be subjected to a number
of servicing operations at one time. Such a dock must be provided with various
tools, jacks, hoses, etc., and should be automated to a feasible maximum degree
so that it can be controlled from a control panel. Docks can be open or covered
(hangar-type docks). A variant of open dock for the An-10 aircraft has been
suggested by the design engineering office of the Kiyev LERM (Line Maintenance
Repair Shop). The Vnukovo airport's LERM has already acquired some experience
C Card ~/2

SERAFIFLOV, A., inzh.; GRIBAKIN, G.p inzh,
On a foundation of line maintenance and repair workshops not
otherwise. Grazhd.av. 18 no.2:23 F 161. (MLRA 14:3)
(Airplanes--Maintenance and repair)

SERAFIMOV, A.
Ways of progress. G--azhd, av. 421 no.7:22-2-11 Jl 164.
(Ml RA 18:4)
1. Yachallnik oldela Upravleniya inzhenernc-avi.atsionnoy sluzhby
Glavnogo upravleniya Grazhdanskogo, vozdush-nogo flot---.

DIMITROV, N.; SIMAFIfiov, - 1.1-
Electrocardiographic changes in influenzal -infection. Suvrem.med.,
Sofia no.8:59-63 159.
1. Is Gradskata obedinena bolnitsa - Dimitrovo. Gl.lekar: B..Iva-
nov i Profilaktoriuma pri mini 'IT. Nenkov" - Dimitrovo. Gl.lekar:
G. Naumov.
(INFLUMIZA diag. )
(ELECTROCARDIOGRAPHY)

PIN.
1,ek.hanichna tekhncloCiia na telcsb- inJ ze maLeri ali; apre, ura na -laiuove za VI klas
na rekstilrd,e 'Uekhi-L,.kunii. Sof;ya, Narodna pros~,eta, 15'1. 114 p. (1.116--hanical
technoloEy c.;1' te::-Iu--ile -naLer].als. Mercerization o-r' a textbook for the
t;lird course n schGols.)
SO: "cnt_hl,,/- Li ot of Sast Saroneaii Acces--dons, L. Cu. , Vol. 20. 7, JulY 1553, Uncl.

SERAFDIOV, A. --
"Drawin', Apparatus for Cotton Spiming. " p. Pl,
(LEKA PWNISHUNOST, Vol. 3, !to. 2, 1954-, Sofiya, BA,,,arJa)
SO: honthly List of East European Accessions, (EEAL), LC, Vol. 4
No. 5, May 1955o Uncl.

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Methods o( study of "menin cal permestriucy sea .
a*
Iodides. 1. A. ObLrbard and B. X. Serafinw. Arch. i-49
scs. biol. (U. S. S. R.) 34,
00 On the basis of animal and clink-al cipts. th,, authos .00
00 1; conclude- Ths permeability of the lxurkr betwen Ow
j blood and the M" fluid for Cl- and Br- imt notTor
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B.
USM/Madioine - Pnefimoconidoie Mar/Apr 1948.
Medicine - Pr4bylaxis
"Neuropsychiitrio Symptomatology in Silicb4is," Prof
B. N. Seraf imov, lust of - Regional Path., Aciid S6 i,
Kazakh SO, Ghair of Psychiatry, Fazakh Ked Inst,
Alma-Ata, 3 PP
"Nevropatol. i Psikhiat"' Val IM, No 2
Mcplains some of the more interesting and yet vital
problms in contemporary Intoxication, silicosls,~
vfilch in recent years -has been thoroughly stficliecl
in the UM, vith regard to prophylactic measures
and other aspects of interest to hygienists and
pathologists, Bubmitted 29 Apr 1947.

~17"Ii'~TPV, 11 '. ',".
C'erafimov, B. 11. - 111 istopathological cI'-:,7nr.-t3 fn ne!r7,~us
1 .1 . I
of c..--ts tinder mnscalin-C intoxic--tion," Trudy Fiziol. M-ta
im. Pavlova, Vol. !II, 19h9, p. 123-30 -- P. 130
SO: U-3566, 15 Earch 53, (Lctopis 'Zhurral Inyl-h Stotc-L.,, 11r0. 14, 190).

Vzhur~
-46(1052).---~rou wwt .111%ce-an -Yom&g
- . e-.: - 1, 3 * -rabbit
placed in glassebanibefs int which -0.5 g. of du -IC
G AM 11
cited 6xupmition- was blowwieverr- nntx;, Mix ur
c6niiii6d. of SiO~ S7.Z%,' Awi' 3~b4
3.0%," Zu 7, 98. 61~%
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- -Thedits
chdatbers varled,- bkat 6-
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3 eds; when aii,
began fo -sh i
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t
o 'o;. elianves 6weremore prouput
_the.rabbi"~~ ~.At the:end.-of 3-to S were
th'. - . . -r -aud
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-plictana
Ch kcs-are de-scribed.
the nuOa I b'5iio. A rumatm
wid ~Chttlig(~v ttkAl
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-evident., ht Awllv.~ StI111114C,
ctilar lietworL. wcrc
Si oright i4O~
sucti as

SFALLF 1110V . B ~prof .
In memory of V.14.Bekhterev. Zdrav.Kazakh. 17 no.1:47-48
'57. (MIa 12:6)
(BEKHTIMEV, VIADIMIR MIKMILOVICH, 1857-1927)

SERAFIMOV, Dimo
Some conclusions from the work of tear-hera in mathematics in
the medium grades during the 1963/64 school year. Mat i fiz
Bulg 8 no.1t23-26 JA-F 165,
1. Senior Inapectorp Ministry of National Education, Sofia.

S E RA F i -7-T,75 K .
'IEI-ec-uron Lens. if
P. 23 (Radio I Telvizija, Vol. 7) Ho. 6, 1958, Sofida, Buluuaria)
M'cnthly Index of East European Accessions (EEAT) LC, Vol. 7, No. 11,
Nov. 1958

ionospheric forecast twed in determining optim= freque=ies
for radio comnunication. Radio,i televiziia 11 no.6:168-169
1622.
1. Sutrudnik pri Geofizicheskiia institut na Bulga6kata
akademiia na naukite.
4 i

SERAFIMOVL.K.B., irlzh., naucLen sotrudnik
lonospherical forecast in determining optimilm frequencies for radio
communication. Radio i televiziia-j:1 no.8:254 162.
1. Geofizicheski institut na Bulgarskata akademiia na naukite.

S1169Z631000100110091062
D218/D307
AUTHORS: Uzunova, S. and Serafimov, K.
TITIZ: An expression for the angle of emission of an an-
tenna in the vertical plane which corresponds to
a given range
PERIODICAL: Referativnyy zhurnal, Geofizika, no. It 1963, 401
abstract IA206 (DokI. Bol AN 1962, ve 15, no. 31
265-268 (surmnary in Eng.)I*
TEXT: A new improved f ormula and a simplified expression
are reported which are convenient for engineering calculations of
the vertical angle ( A) of emission of an antenna. The formula
gives A as a function of the working part and the ionosphere para-
meters.
Z-Abstracter's note: Complete trans'lation2
C 1/1

SERAFIL-iO-V,-K-; VFWM--HIU*, B.[Tafradzhieva, B.)
I
Bond coefficient between the maximm applicable and critical
frequency of thejonospheric radio wave propagation. Doklady
BAII 15 no.5:475-478 162.
1. Predstavieno akad. L. Krystanovym [Krustanov P L.I.

~_ACC NRt APG028353 SOURCE -CODE:--- UR/0203/66/006/004-/06-85-/069-4
~AUTHOR: Scrafimov, K.
ORG: Geophysical Institute-of the Bulgarian Academy of Sciences
(Geofizicheskiy institut Bolgarskoy akademii nauk)
TITLE: Stratification and fine structure of the E layer
SOURCE: Geomagnetizm i ae*ronomiya, v. 6. no. 4, 1966, 685-69 4
TOPIC TAGS: H layer, ~`stritif ication, ionogram,
solar.
activity, ionospheri~
ABSTRACT: The stratification of the E layer of the ionosp here consi s ts.-
of individual layers which appear and vanish in groups. These layers
nay be classfied in three groups: 1) morning and evening E2 layer
(which is a regular layer of the ionosphere), 2) intense stratified
formations caused by quasiperiodic oscillations, and 3) stratifications."
caused by the change of gradient in the E layer. These stratifica tion 61_'.
generate the appearance of E2 and E. layers. Special stratification
measurements were made at the.Sofia Station on frequencies of 1 and
4 b1c. Analysis of ionograms shows that stratifications appear at any
place in the layer with the same probability. This result denies the
550.388.2

SERAFIMOVY K.
Corpuscular effects of the total solar eclipse of February
15, 1961, and ionIzation of the night layer E. Doklady BA14 15
.+79-482 162.
no.5.,/
1. Predstavleno akad. L. Krystanovym [Krustanov, L.I.

SERAFIYIOV, K..; UZUNOVA, S.
Optimum covered zones by main aerials. Doklady 30 15 no.7:
727-730 162.
1. Otvetstvennyy redaktor, "Doklady Bolgarskoy Akademii
nauk". Predstavleno akad. L. Krystanovym (Krustanov, L.I.

ACCESSION NR: AT4ol3671 B/25o6/63/004/000/0109/0125
AUTHOR: Samardzhiev, D.; Serafimov, K.
TITLE: Some regularities of the E2 layer above Sofia observed in 1961
SOURCE: B"lgarska akademiya rra naukite, Geofizichen institut, Izv., v. 4, 1963,
109-125
TOPIC TAGS: E2 layer, E layer, F layer, critical frequency, reflection, ionosphere
ABSTRACT: Refined in the work are distinguishing criteria for classifying radio
I~reflections from the intermediate E-F region -- a region for which very few data
have been accumulated and which is very poorly illuminated in the literature. Var-
.ious methods of investigating the E2 layer are indicated. Obtained from analysis
of ionograms made by the Sofia ionospheric station is the seasonal histogram of
instances when reflection from the E2 layer appears (Fig. 1 of the Enclosure). This
histogram shows a significant minimum in the summer and maximm during December.
The intermediate E region is shown to be in constant intensive movement, and this
often leads to changes in the type of layerlike structures in it. A monthly dia-
gram of fQE2 frequencies (Fig. 2 of the Enclosure) was constructed for the month
(December) with especially frequent appearance of reflections from the E2 layer,
Card lo

ACCESSION NR: AT4013671
:and a determination made of the diurnal variation of median values (Fig- 3 of the
'Enclosure). Critical frequencies of the E2 layer have little scattering and are
.well grouped. Also analyzed is the daily variation of instances of appearance of
reflections from the E2 layer during December. Such analyses are indicated to be
-correct only when allowance is made for the screening capabilities of the sporadic
:E layer. With these corrections made, a unimaximal distribution of instances of
~appearance of reflections from the E2 layer is obtained with greatest probability
J
:during the period 0900-1000 hours local time (Figure 4 of the Enclosure). Also in-
:vestigated is the duration of reflections from the E2 layer in December and April
4961 (Fig- 5 of the Enclosure). On the basis of the monthly picture of fOE2 for
'December 1961 and the obtained diurnal variations of fc~2 for individual days of
1the same month, the conclusion is drawn that there is a close association between
-electron concentration of the E2 layer and the zenith angle of the Sun. Established
'on the basis of this is the law governing the variation of critical frequencies:
E2 - (cos x)"
'Exponent n is in every case smaller than the corresponding exponent in the known
dependence for the E layer:
f, E - (cos m)" - T. e, n < /it.
:Card 2/f

ACCESSION JTR: AT4013671
Explained on the basis of this law is the disappearance of reflections from the E2
layer during the summer (the reason being the slower incrt;~ase in ionization in the
E2 layer as compared with the relatively repid increase of critical frequencies of
the E layer, screening the higher-lying E2 layer). Also derived is an equation
relating to the possibility of obtaining reflections from the E2 layer. Through
the use of the obtained dependence
E2 cosm
ej, LFOS 1.
the summer daily variation of the critical frequencies-of the E2 layer can be con-
structed. Orig. art. has: 9 formulas, 11 figures.
ASSOCIATION: none
SUBMITTEI): 03Dec62
DATE AN: o4mar64
ENCL: 03
SUB CODE: AS, CO
No BEF Son oo4
OTHER: 005
-7
Card 3/6 2