SCIENTIFIC ABSTRACT PETERKA, J. -

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001240220020-8
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: August 1, 2000
• Sequence Number: 20
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

FETEM, J. . ins.
h-opertieu of metal-bonding agents made in C2echoslovakia. Strojirenstvi
11 no.1-1:848-856 N 161.
1. Vyzkumny a skusebM letecky uatav, Praha-Letnany.
(metals) (AdheBIVeB)

Uncl.

PETERRA, Jincirich, inz,
Slirface t!-ehtr-.,!rl, befori. , I,(! , t~# .. r,j
I . i 3-7
propertle3, .'-
:" C I~ i. .
,~rqro-jq,' ;

-PENF-PIA, jindrich,, inz.-
Inoreasing the use of adhesive bonding in the Czechoslovak
alroraft industry, latecky obzor 7 no.5:146-150 My 963.

777-
CMM j
AP3=26v z/oDhq/6,)/oDq/co5/oi 46/ol 5o,
ACCESSION M
Sine
AUTIM: jindr En er
TjW: 'Develcpient of the use of adhesives In ~olnts in the Czeebos-
lovak aircraft Industry.
SOURCE: Letechy obZor, no. 5i 1963o 146-150
T6~ic TAGS: . Afte'sives in*aireraft.joints., materials used in adhesives;
properties,of epwW adhesives; use of adhesives joints; BMAesives in
Czech aircraft industry
Gluing~of aircraft parts was originally lb~ited to non-metal-
_AZ5WRACT
lie parts. Sinco 1941, gluixg, of metals was used Initial3y, in Britain.
The main advantage.of using aesives Instead of welding or bolts Is
econow. In Czei,.-hoslovakia., udhesives based on epoxy resins are chiefly
used. Thooe =arlmd ZV are pilot plant products,, CBS are inftustrial
-aaheBives. All 2we cured at 180C for 3 or at 1h5C for 8 hours. The
Czech adhesives tire subjected to-tests for strengt1h in'shear, *agility,
1/3

'
aircraft
,I-- ,. and w~~)osure to water and sea Water. A table giving proper-
ties of resInB 21,V 1210 and CIES 110is shown. Before the adhesives are
metal.,4=face must be tr
used,.the t eated; usually first with a solvent
na then with ari acid. The% ixeatment varies according to the nature of
Aah
-thezetai* etsive foils are still rare in Czech proauction but there
Is an adequate mpply of povders and solutions. The foils must be ap-
plies unaex coradderable pressures, Care must be exercised to use ad-
besive that havtt a tem
p. exy. coeff. similar to the metals to be attach
46 Western &ero
ed,to'each oth A list of planes using mAhealves in
-~helr construction is given. The Soviet AN-4 and AN-24 also use such
..parts. The umul application of this construction Is in strengthening
of . critical parim, for structural reasons. Weight Is saved In this way,
In Czechoslovakia,, helicopters HC-2 and HC-3 use supports of rotor bl -
ades constructe& In this way; air~plane*L-200 has directioniLl levers fab-
ricated with us& of adhesives. In the planes listed above and in plane
other partt of this kind. are used. The quality of resin 1210 with
curing
agent P21s excellent and equal to any available. 1,t has a
strength In sheaIr of 100 kg/cm sup 2 at 83c- Orig. art# he-s 8 graphs
_cv
2/3

PETERKA, M. , inz.
Gaskets and s,~hls from chr~rr4cally
Strojirenst.vi 14 n(-,.1:44-50 .7a 104.
1. Statil v,~-,Yumny us!E~v viterlalu b ~ect~noj~~glp,

PETMA, M.,, inz.
t,
Teflex stabilization. Chem zreW I? no.9t656-4)65 163.
1. Statni vyzkumny ustav meterialy a technologie, Praha 3,
OPle-talova 25.

ACCESSION NR: JAO16296 Z/0032/64/014/001/OD44/0030
AUTHOR: Paterka, X. (Ehgineer)
TITLEs Use of chemically resistant plastics in gaskets wid glands
SOURCE: Strojl*renstvi, v. 14, no. 1. 1964, 4"50
TOPIC TAGS: easketing material, expansion joint, gland, teflon, polytrifluoro-
chloroethylene, PVC gasket, polyamido gasket, polywdde glabd, polyethylene
gasket, polyurethane gasket, silicone rubber gasket design, gland design
ABSTRACT: Evaluation of plastic materials, chiefly teflon, used for gaskets,
expansion joints and glands is presented. Selection of a suitable material
depends on chemical resistance, mechanical properties, temperature resistance,
thermal conductivity and expansion coefficient, retention of shape, suitable
hardness. and cold flow of the material. Advantages of filled teflon are
mainly reduction of cold flow and decrease of friction losses. Filling with
asbestos and fiber glass is suggested, Envelope gaskets with w" 1o5 and 3
thick are described. Thickness Rf teflon gasket should be calculated by &
suggested equaiAon Wal - 0483 GzF + (2b) T3-14 0 a P)o where Mal is the
Card- 1/4

AccEssioN m: jP016296
pressure applied to gasket expressed in kp, G is average diameter of the
gasket, P allowable pressure in kp/sq. cm, b effective width of gasket, and
m is minimum ratio between pressure on gasket and internal pressure in pipe;
its value is given as 2.00 for a thickness of 3.2 mm and 300 for 0.8 m.
Various examples of practical application are given. Zxp~ansion joints should
have a wal.1 of 0.5 = for 3 atm at 20C and 0.35 atm at 200C; 2.5 MM at 14 atm.
at 20C and 1 5 atm at 200C. Glands may have a direct corithat with the shaft at
Val. up to 0:8 Mifsec without lubrication. Uxbrication, may be made by pumped
liquid. Economic advantages due to long life of teflon are evaluated. Applica-
tion of polytrifluorochloroethylene for membrances up to 250 = diameter and
0.6 = thick are discussed. Polyarethanes are not yet available in Czechoslova-
kia. Silicone rubbers are produced, and used for work with oils and as binder
of asbestos f1bers. Orig. art. bass 6 figarest 3 tablese
ASSOCIATIOM none
SMITTEN 00
SUB CODEs MA, MD
Card 2/2
DATE Am l4Feb64
W RET 5"1 000
WELs 00
OTMs 002

S/081/62/000/021/057/069
BW/Bie6
AUTHOR: Peterka, Milan
TITLE: Method of thermal stabilization of polytrifluorochloro-
et jhy I ene
PERIODICAL: Referativnyy zhurnal.' Khimiya, no. 21, 1962, 477
abstract 21P264 (Czechoel. patent 98906, Xarch 15, 1961)
TEXT: Polytrifluorochloro-ethylone (I) can be stabilized by adding
0.01-0.2% by weight of KH -' Na-' K- or Xg-salts of HBrO or HBrO In
4 3'
this case the ti3ernal stability of molten I iq considerably higher than when
using CrO,9 Xafil),, NaCIO, or NaN 02- The stabilizer is added to powdered
I in the solid form or in an alcohol solution with subsequent drying.'
Abstracter's note: Complete translation.
Card i/1

CZECHOSLOV,aL./Ch,,~ Acal Tochnoluvy. Ch,.~.Acil H
P:,- 'ucts -in' Thoir ..-p-,Dlic -ti,ns.
Syn*chetic Poly-ers. Plastics.
Jabs Jou-z, : Rk,'L Zhu---Khi-Aya, N3 69 195~~ 21511
i~uthor : Pet,,,rk,-. 11-,
Inst,
Title PhYsicju-Odlanical Pr-porties o-f T,~flori.
Ori,f.- Pub Strojirenstvi, 1956, 89 hl,,) 41 293-296
jI.bstr2ct 1. revievi of th-~ phYsic,il, ach-inic.,d a.,C
,'iolectrical propertius of toflon is pre-
sunteO. Data arc cited. un th,; cxonc~;Acs
of th,~ use of articles !-vv'o of tc-flu,-,.
Bibliogr.-iphy, 24 titl-js L S,~:,~ U v
Ca r C

c:,,;-a cun. c i* :3 f- S L- 6 r',' I
_r e r. i t v n o 16L,.
T:L9tir~lte o' J -)n u. -Maltoll,
t.,-adamy of 6-.tj- c(3,,:.

BLAGA, S. I.Blahn, S.] (Prapa); iITERKA, V.
S-,,nt~,e3is of d1screte cowrol t3vStem uv' .
. ' ' S v a --q~,are-
error integral criter-"on. Avtom. i tele!!-I. 2C no.1:31-41 Ja 165.
(M:RA 18:4)

V., inz. (3,3C.; J,, inz. Ck.
Analytic expressi,-,n o' sone rel-a*-,ons be t %. e e n th e ' 'n,e :-M -~ a,~. a --, z
raranuters -)i' wet steam and overteited steam. StrC."LrCn3*V~
no.5:351-354 ki- '64 .
1. institute of information Theory and Automat--on, Czer-~.o:~Ioviik
AcRjemy of' Scianc,!-q, Pragiie.

PETERKAP V.
"Autoilatle control systema" bv B.G.Kuo. Reviewed IV V.FeLerka.
Automatizace 6 no.12.Suppl.tTechnicka literaturminsert D 16).

L =61-66 F.-1F(k)/3e(h)/3iP(v)/F-4P(j) jjp(c) DC
ACCESSION N3: AP5012866 CZ/PO88/65/000/002/0127/0143
AUTHOR: Pl6hs, Gvatopluk (Engineer); taterkao Visclav (MgInserp Candidaft of
sciences)
TITLE: Synthesis of sampled-data control systems using the square-error Integral
criterion
SOURCE: Kyberneflk;~no. 2, 1965, 127-143 11
TOPIC TAGS: data processing, information theory, automatic control syste , data
procession system, data sampling
4 rl
ABSTRACT: A design of sampled-data control systems with a continuous linear plant
characteristic is described In which a square-error Integral criterion Is used. The large
transient of rei3ponse to the step function on the reference Input, usually obtained if a
general square-error integral criterion fig employed, can be removed by neglecting errors
in the first sampling period after the start of the transient process. The proposed me
to based on expresBing,the modified square-error Integral by a z-trawform. This cowpl~
integral to mintmized by using the calculus of variations. A requirement concerning the
regulatity of a certain complex function inside the unit circle to the startIng point for the
calculation of the optimum form of the controller output. The method Is upeM for every
Card 1/2

L 00261-66
ACCESSON Mt: AP5012866
type and every finite-order linear plant-transfer function. The transfer function of a dis-
crete controller depends on the form of the reference input and can be determined for
every function provided Its z-trawform In represented by a rittloW function. Calculations
for a practical, example are gLven. Orig. art. has: 2 figures and 71 formulas.
ASSOCIATIOM Ustav teorle Informace a automaUzace CSAV (Institute of Information
Theor_v and Automation. CRAV)
SUBMTTED: I5JulS4
ENCL: 00
BUD CODE: DP
NO REF SOV: 002
OTHER: 005
gel
Cwd

BLAHA, 3vatopluk, inz.; FIETERKAI Vaclav, inz. CSc.
Synthasig of dIgItnl control Bystems accordir4gr to the square
err:)r int,:qral criterlDn. Kybernatika 1 no.2:127-143 165.
1. Instituto of Information I)ioory and Automation of the
Czechoslovak Acad,imy of Sciences, Prague 11, Vyaehradska 49.
Subidtted July 15, 1964.

S/194/62/000/008/017/100
D201/D308
AUTHOR: Peterka, V&clav
TITLE: Calculation of time chLracteristies of controlsystems
PERIODICAL: Referativnyy zhurnal. Avtomatik.a i radioelektronika,
no. 8, 1962, abstract 8-2-114 r (Automatizace, 1961,
5, no. 1, 11 - 15 [Czech.])
TEXT: The article deals with the numeribal computation of the res-
ponse of the control systems described by high order equations. The
proposed me-thod of calculation is based on the assumption that the
Laplace transforms of any quantity in a linear controlling system
(or in the system of differential equationp describing this system)
can always be reduced to the form
Y(p) = U(p) [1 + Z(P)j
where U(p) and Z(p) are complex junctions, the original functions
u~t~ and(z(t) of these are easily found. Eq. (1) may be written
Y p = U p) - Z(p)Y(p). Using well-knovm relationships for the ori-
ginal fu*action of a product of image functions
Card 1/2
J

8/1 9416VO00101 0/030/084
AIWA126
AMOR: Peterka, Vhclav
TITLEt The transfer function of a ateam turbine witli preheatev
MIODICAL: Referativnyy zhurnal, Avtomatika i radloelektronl~a, no. 10, Vj62,
85, abstract 10-2-169a (Souhm pracl o automat. 1959. Praha, 1o'1,
28',, - 302; Czechoslovakian; English summary)
TEXT: The author presents the results of a detailed theoretical study of
the dynamic properties of a steam preheater and its influence on the operation
of an automated steam turbine. A method is proposed for the simplified calcula-
tion of the dynamics, based on the assumption that. the processes taking place In
the preheater space and in the cotinecting lines are of an isothermal nature.
Comparison of the complete and simplified methods shows that the accuracy of
calculations made by the simplified method is fully acceptable. The simplified
method can be quite easily extended to the case of a steam turbine with several
preheaters.
[Abstracter's notei Complete translation] A.S
Card 1/1

MERKA, V.; NECHANICKY, J.
----
"Automatic control Im the production of woodcutting plates."
Automatisace. Praha, Czechoslovakia. Vol. 2, no. 3, Mar. 1959.
Monthly list of Fast European Acceealone (EFAV, LC, Vol. 8, No. 6, Jun 51), Uncles

PETERKA, Vaclav, inz. CSC.
Princ:iples of t-e theory of digital control Ircuits.
Atitomatizace 7 no. 4: Fr-90 Ap 164.
1. Institute of --nformation T~-,eory and Automation,
C-~echoslcvak Academy of Sciences.

PETERKA, Vaclavp inz., C.Sc.
Calculation of time characteristics of control circuits.
Automatizace 5 no.1.11-15 Ja 162.

PFTFICK A, r
' ~,a ra, I-er , .9 t i - s ne '- '
' ' r" " t '- - -') IT."I " t .. ~-, r; 3 -, f '~ ~j 0 'J, r,,.-,.:- 1~ I I r n
Vil I" LqY - C"'Irfyr c h s SA V I -/ n,)., I I , 1 -6 3

/; '_' ", 7c.~
8/05 63/044/001/042/067
B141Y35102
AUTHORS t Dainburg, R. Va., PqLerlon,__R. K.
TITLEt Rpsonannes in electron scattering from hydroge" atomo
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy fiziki, v. 44,
no. 1, 1963, 244 - 246
TEXTs The behavior of the elastic scattering cross section near the ex-
citation threshold of the 2s levels is investigated taking account of the
strong coupling between the Is and 2e levels for the incident a- and p-
waves. According to Rose and Shaw (Ann. of Physicat 13f 147, 1961, Phys.
Rev., 126, eo6, 1962) the behavior of the cross section near the threshold
of a new chE,nnel in investigated with the help of the matrix N with the
elements M = kI1+112 (K-'),jk1 1+1/2 , where K is the reaction matrix. In
ij i i
the case of two channels with 11 .12-1 elastic scattering via the "prior"
channel is described by
Card 1/4

S/056/63/044/001/042/067
Resonances in electron scattering... B141/B102
/?~ < 2E,,; (2)
k2 + 12 ' I ,
1111. k2 = P, - 2Eo; (3)~
if. ~ (- 1), 1 k, I',+,) -1
4a (21 + 1) (All, + k,"") k-
to 2 2' > Mo. (4j
1(M,1-,k1WV,n-ik3)- 121
The threshold energy for excitation of the 2s level is E000-75 at.un. The
authors have calculated N ij (E) - M ij (E0) + Rij (E0)(E-E0) for E >20in
bffective-radius approximation by electronic computation of tho system of
integro-differential equations according to Marriott (Proc. PhYe- Soo. 72,
121, 1958) and Method XI from Idiln's book "Numerical integration of
differential equations". U (E ) and the effective radii H IkE ) are cal-
ij 0 ij 0
culated for the singlet (+), triplet (-). and ;he exchangelese (0) cases
(cf. Fig. 1). It is shown that the Hoss and Shaw'e assumption that'the
off-diagonal radii are much smxt1!-- thai, tl~e Utigorial one3 is not always
fIA-4 '/.I
-T

S/056/63/044/001/042/06T
Resonancea in olectrom scattering,.. B141/B102
fulfilled. Th,3 second resonance found by them is proved to be not a true
org; it arises from neglecting the higher terms in the expansion of M,
which are considerable (an estimate yields 10 - 103). For the elastic
scattering of the p-wave only one peak is foundl it belongs to the triplet
cross section and is positioned at d - 0.74 k2 (given in terms of Re2 ), Cal-
l 0
oulated vith the first three terms of the expansion,. The peaks observed by
Smith et al. (Phys. Rev. 125, 553, t962) are sub-threshold effeete. There
are 2 figures and 1 table.
ASSOCIATIONs :Institut fiziki Akademli nauk Latviyakoy SSR (Institute of
Physics of the Academy opf Sciences Latviyakaya SSR)
SUBMITTEDs -July 17, 1962
Card 3/4

PETERK-OP,-R. ", [Peterkops, R.]
Exciting S-levels of the hydrogen atom. Vestis Latv ak no.10:91-96
159
1 - (EEAI 9:10)
(Hydrogen) (Atoms)

PSTFMOP, R.K.
Calculation of exchange in the tbonry of collisions. Zbur.
nkup.1 teor.fiz. '17 no.4:1172-1173 0 '59.
(14IRk 13:5)
(Nuclear reactions)

it
PETERKOP9 R. K.9 CAND PHYS-MATH SCIV IONIZATION OF THE
-,o~L,o-oj-
HYDROGEN ATOM BY USA**-01"-MW-"V-TW8E ELECTRONS, LEN I H-
GRAD9 1960. (LENINORAV ORDER OF LENIN STATE UNIV im A, As
ZmoA"ov). (KLq 2-61, 199).
-18-

82827
S/048/60/024/008/003/017
BO12/B067
AUTHOR: X
TITLE: Partial Excitation Cross Sections of the
/7 _!!Edrogezf Atom
PERIODICAL: Izvestiya Akadomii nauk SSSR. Seriya fizicheakaya, 1960,
Vol. 24, No. 8, PP- 946-949
TEXT: In this paper, some partial excitation cross sections of the levels
of continuous toad discrete spectra of the hydrogen atom in the excitation
from the ground state are investigated in Born approximation. Formula (1)
for the amplitude of the excitation of the level nlm in Born approximation
is written down as well as formula (2) for the excitation cross section of
the level n. The formula for the excitation cross section of the k-level of
the continuous spectrum has the same form as formula (2). C(q, a), the
effective cross section is introduced (in units of the momentum interval
of the scattered electron). q - momentum of the incident electron, and
c - momentum of the scattered electron. The expressions given in formulas
(1) and (2) un-Jer the integral are expanded into spherical functions, and
Card 1/2

PETERKOP,_~,,L]~eUrkops, R. I (Riga)
Asymptotic disintegration of wave function of charged particles.
Vestis Latv ak no.9:79-84 '60. (Ew 10:9)
1. Akademiya nauk Latviyokoy SSR, Inatitut fiziki.
(ligen functiona) (Particles) (Asymptotes)

PETERKOP, R.[Peterkopig, R.] (Riga)
Consideration of exchange in ionization. Vestis latv ak mo.12:
57-60 l6o. (ERAI 10:9)
1. Akademi3ra nauk Latviyakoy SSR, Inatitut fisiki.
(Ionization)

59833
AUTHOR: Propin, R.Kh. 920119191
TITLE. Calcliation of the Probability of Self -Ion i zatlon U
Helium and4ithium Atoms
PERIODICAL: Optika i spektroskopiya, 1960, Vol 8, Nr
PP 300-302 (USSR)
ABSTRACT: In light atoms the probabl'-Ity c:f 1,when
it is possible) is much greate-1- taan the probab-1ity
an optical transition (Ref 1) In the case of `.elium
and lithium self-~onlzatlcn '-S POS31ble in tne state ~if
doubl-t excitation which ma~,, be pznDduced. -for examp_'e, r-
electron collis:ions, Self-lon-Lzation appears.
experimentally as the absence of lines repfasent:-.ng
optical transitions to o7 from the approp-l"Late states,
Self -ionization does not o,-cur -when 1~. is Irorbiddan by
the selection rules, i.e. ceitain iines 'representing
transitions from the states of double excitation a-5
observed. One f-,-f' 3U,~h !_Ine~,. -was reported In the spe(~t:-xT,
Card of helium at 320.4 1; it ii? due to a trarisitlon
1/4 ls2p3p --~ 2p2 3P (Ref 2). The pi~cbabill-.y uf salf-
ionization is given by: L"K

~9233
6/05-!/60/006/01/00-~/038
E20-1-/ElQ, 1
Calculation of the Prcbability of Self -Ionizatic.n in Helfam arid
Lithium Atoms
W ?J6
- I ~ 41
h L ~k,
1 )
k0j I
where y:L and Vf are the wa-,,,r---f,Laot.4r)ns of the
and final statea of t~-a sy&tefn, -~k 1is -.h~ distar--ts
between electrons denoted 1-.rT k- and d 'r r e p9 n r, s a
L'a -Y ;o-
roduct of the elemen r ,-IrD E,0 a I P 'D n S,
Mmmation and Integrat ion ref er to al! el-otl Dr-z:) 4~
present paDer deals wi--h calculation of p7.;ba g,4~
o f s elf - ioni za t 1--on 1-rk ~i evy, a nd a + cm
author calculated the arierizies .9, anii ,-,he
of self -ionization w for helium and lithi-um Th E,
Card results are given beloT4
2/4

Calculations of the Probability
Lithium Atoms
69833
S/051/60/008 7.
E201/Elgl /03/003/038
of Self-Ionization in Helium and
v

�Iate Helium
Uin Rydberg units)
w
(seo-1)
2s2 JS -1.5443 51
3 x loll+
2s2p lp
3
2
2 -1.36go .
3.84 x 1013
s
p
p
2p2 18 -1.5112 5.01 x lo13

2p2 3p -1-1939 5.66 x 1012

2p2 1D -1.4088 0
-1-3826 1.33 x 10 14
Lithium
Is2s2 2S -10.6922 8
03 x 1014
ls2s2p2P
Card -10-3801 .
9.88 x loll+
ls2p2 2S
3/4 -10.1100 2
8 x 1012
ls2p2 2D -10-3765 .
2.18 x lo'3

69833
S/051/60/008/03/003/038
E201/Elgl
Calculation of the Probability of Self-Ionization in Helium and
Lithium Atoms
For the same states the author calculated the approximate
wave-functions. Acknowledgement is made to
B.T. Geylikman for suggesting the subject and for his
advice.
There are 2 tables and 2 references, of which 1 is
German and 1 is English.
Card
1+^
SUBMITTED: April 17, 1959

PROP~~INR A-he
Calculating the probability of autoionization in He- and Be+ ions.
OptA spektr. 10 no-3:308-311 ',Ir 161. (-URA 14:8,1
(Ion3)

AUTHOR:
TITL3:
317~1
C, 9 / B 10 2
Pe-terk-op-,,- R. K.
Ionization c,f hydroCen atoms by electron., with
account of interference
PERIODICALs Zhurnal eksperimentallnoy i teoreticl.uLkoy fiziki, v. '11,
. U
no. 6(12) , -'-'1 , 1938-1971)
TEXT; The ionization cr.)ss section of hydrogen atoms bv electrons .u--
been calt)lated in Born' ~ approximation, takinE interference intD a- -3ur~'-
The ionization cross section consists of two parts %~ = ~' - ' v* r E.,
'-int'
~Z' denotes the cross section wit~.out exchanEe, and IQ int the interfer~-nce
term expressed bys
Qi.t kc de Re (/ (k, 01* (c, k) exp 11A (c, k) - 1A (k, c)l)dkdc.
Card 1/0

Ionization of hydrogen atoms by ...
where q denotes the momentuir, of the
denotes the ionization ampli-.ude if
momentum &~, and the atomic electron
expression is valid
31791
S/()56/61/0,11/006/041/054
3109/B102
incident electron, 0/2, f(k~,J`)
the free electron flies off vith the
with the momentum 1~. The foll,)wing
(k, c) 16 exp (it (k)) 1(i - 1k)l + 011-1 ((1 - n) kx - 01
(nk (I - exp (- 2n1k)))'11.%1 I I + (x - k)ljn+s
6 (k) = arg r (i ilk), n = juk.
(4)
In Born's approximation one has L(k,`c) - (k). (7) has been calculated
with the ~,__-)!N-2 (BESM-2) computer. The results shown in a fi6ure
demonstrate that taking interference into account will improve considerably
the agreement of the Born cross section with. experimental data. There
are I figure and 6 referencest 3 Soviet and 3 non-Soviet. The three
references to English-language publications read as follorst S. Geltman.
Phys. Rev. , 102, 171 , 1956; R. McCarroll. PrOc. Ph~rs. Soc. , A70, 4k
10,5517; Y.". Fite, R. Brackmann. Phys. Rev., 112, 1141, 1956.
Card 240

3 3650
AUTHOR: eK1 ~)P
VA.
TITLE: The role of the exchange
2s and 2p levels of hydrogen
PERIODICAL: Optika 1. spektroskopiya,
S/051/62/012/001/019/020
E202/E492
during the excitation of tile
by means of electrons
v.12, no,1, 1962, 1115-1117
TEXT: The author evaluates theoretically the three component
members of the effective cross-section excitation of the hydrogen
atom with electrons, viz. the direct, the exchange and tile
interferential. terms. Some of the results are compared with the
experimental measur ments of the amplitude of exchange excitation
cross-section (the TkJgJ2) for the 2s level, given by W,Lichten
and S.Schultz (Ref.l: Phys. Rev., v.116, 1959, 1132). The cross-
sections were evaluated by means of the distorted-waves method
quoted by H, Massey (Ref.2: Rev. Mod. Phys., v.28, 1956, 199)
The problem was solved by introducing full orbital moment and
projection. Three incident waves were considered: L = 0, 1, 2,
For L = I and 2, only one scattered wave with moment L- I was
taken for the Is -2p transition. The amplitudes were expressed by
in'-egrals containing functions of the elastic scattering. Their
Card l/ 3

3,,650
S/051/62/012/001/019/020
The role of the exchange ... E202/E492
integral-differential equations and the numerical evaluations
were carried out using the same methods as used by R. Marriott
(Ref.4; Proc. Phys. Soc-, V-72, 1958, 121)- The calculations
were carried out with the help of an electronic digital computer
ra'4CM-2 (BESM-2). The values of cross-sections were summarized
in a table which contained values for various impulses and momenta
of the incident electron. It was found that the exchange term
JgJ2 played considerable role when the energies were small, The
inclusion of the exchange term gave much closer approximation of the
direct excitation. The exchange and interference term, viz.
1g12 and Re(fg) respectively, were also included and in many
cases they led to mutual extinction. The article was concluded by
comparing author's data with some of the experimental data
available, stressing the fact that at low energies the sum of the
three calculated partial cross-sections exceeded the experimental
value of the total cross-section. There are 3 figures, I table and
12 references: 2 Soviet-bloc and 10 non-Soviet-bloc. The four most
recent references to English language publications read as follows~
Ref.l: as quoted in text; Ref.8., V.Burke, M.Seaton. Proc, Phys.
Card 2/3

DMU11G. R.Ya.; FETERKOP-,
Role of ocattered vaves with the moment L - I in 1s- 2-p-tranBitions.
Opt.i spektr. 12 no.5z656-657 Mq 162. OHIRA 15:5)
(Quantum theory)

PETEMOPS R. K.
Wave function of the c-*-- co-U-is-lor.. Cpt.i ryektr. 13 no.2:153-15S
Ag 162. 041RA 15:1-1)
(Wave mechanics) (CoLlisions (Mclear pbysics))

112189
6/051/62,/013/004/001/023
Z03-VE314
AUTHORS: Veldre, V.Ya. and Peterkop, R.K.
T IT L, E': Distortion of the incident s-wave in the ionization
of the hydrogen atoms by electrons
PERIODICAL: Optika i spektroskopiya, v. 13, no. 4, 1962,
1,61 - 464
Ti~'A-T: In a previous paper (Peterkop - Izv. AN LatSSR, 10, 91,
1959) the partial S-ionization cross-section (both electrons in
S states after ionization) was discussed on various approximations~
each of which led to a different result. In the present work
the S cross-section for the ionization of hydrogen,.us computed
on the basis of the distort ed-wave method and without taking
polarization and stro=S coupling -into account. The elastic-
scattering function was found by numerical integration and the
wave function for the final state was chosen on the Born-
OMenheimer approximation. Numerical results indicate that the
Born-Oppenheimer approximation is unacceptable but since the
partial S cross-section is only a small fraction of the total
cross-section there is very little hope that these calculations
Card 1/5

~-/o 5 1/6:.'/0 1 3/00VU01/02 31
Distortion of the .... i.-L) 3 2/ E3 14
can be compared with c\F),-rimenLai results. However, tile rebuits
indicate that the distortion of the incident s-wave has a
considerable influence on tile calculations at low incident
velocities but since thf- velocities of the electrons leaving the
atom are even lower, tilt. cro-s---section may be very sensitive to
di6Lortioris in the final-b-.ate %cave functions. Fig. 2 5hows tile
average cross-section5 allowed for and Fig. `j
wiLn distortion
shows the average cross-sectiors on the Born-Oppenheimer approxi-
mation. In these figures 1.41 and Q0 are given by
k6)
................. .........
...............
1~rh er eq is the momentui;i uf tile incident electron E
k is the electron moi;;cIntuin ~,fter Lonization, E c
c is the momentum of tile _second electron after ionization. 'i 11 0
dzished curve in Fig. 4 1.-: said to be the"theoretical limit"
Card ~1/3

5/051/62/013/004/001/023
Distortion of the .... E032/E314
There are 4 figures.
SUBMITTED: August 17, 1961
Fig. 2: -1
0 X5
Card 3/3
Fig. 4:
;:al
10 0,7
t
03
2

nq
I- K96
s/o5l/62/013/004/ol6/023
E039/E491
AUTHORS: Damburg, R.Ya. , Peterkop,_ R.K.
TITLE: The collisions of electrons with hydrogen atoms
taking into account strong bonds and exchange
PERIODICAL: Optika i fpelctroskopiya, V-13, ho-4, 1962, 597-598
TEXT: Results of calculations-on collision crosa-sections are
presented assuming full orbital moment L = 0 and taking account
of exchange and bonds between ls, 2a ana 2p levels. A system of
three integrodifferential equations was solved containing ton
definite integrals. The calculations were made on a
(BESM-2) computer. In table 1, direct, exchange, interference and
neutralization cross-Bections are presented. The anplitude of
direct and exchange cross-sections is defined by
f -mL (f f g -L (f+ - f-)
2 2
where f and f are the amplitudes of singlat and triplet cross-
sections. These and the neutralization cross-section have the
form a += i~fi2 + )g 2 + 2 Re (fgm), a - If)2 + W 2- Re (f gm) .
Card 1/3 ; I
UU11us, c with exchange and strong bonds.
Card 2/3

391)193
t,: I C
a~ eX7D-, r,
-,'nen Coul3ZC0 :Drces -!'C
c
2 V
10
Card 1/3

7'/056 /62/34 ~-12/
Asy--stotic behavior oll' a ,,7ave ... 2c,:/B11O2
trajectory JT* 1 0 (V (a) + w (r - a))
r -~- (rLy,! -7j- - - -()I,
dr +100 7" , r
The motion of the oartic-os aDzroac-es L!~at of free,
as their interdismance incrcaases. TheEsym.)-,,ot4c behav---or ~)f
J s gi veil by S r~ -21 t + i. r - , V ( a ) / 1~ 2 E ) 11"', rL -, y: % ') t c~c
--n the con"Caration s,)ace is c~&.-,L;ud by
the same way as *Dy scatte-,ir-C froiz, L con--~ant p,)tont--ai V,
~ Ci
ThIs -eneral result -4m-ilies Ls,.mntotic bc-hz~.v~or o` a wavii
1wo charaed narticles and t',-,, rosul-, ob-a-ne~' by R. ",.rL
Rev., 108, 1512, 1957) for ..Y;o charged and one reu-,.ra. part-,c-,~.
ion of tho wava furlotiall !I. a oolvor ooriao of ~ln r)pr % i-rn i
swae result as a semi-claualcal approxit;i;ition. ill tho
forces 9(r,a) can only bt2' e):~)an--cd to functiuns
an,--les un which V(a) cioes r.Jt d~~-,end. : n e Yand 4.n n r , 3
remaining angloo one firs'. has to s,eparate a factor can:;ainin~;
rithmic ohase from the wave function.
-3S0"1 "ION C ys,,o~
Institut f4zi,:i 'ademii riauk L,-.tvi-% -H
Physics of the Academy of Sciences of the
~.ard 2/3

5/051/62/01"/005/021/021
AUTHORS. Damburg, ii.Yn. alld Petorlcol-i, R.K.
T I T L On tlci role of the scattered wave %,kith angiilar
monentum L-1 in 1.,j-2p-transitions
PER1QUICAL: Optil,,A i spektr-oskopiva, v.12, tio.9), 1902, 6r)6-6137
T EX T : In calculations concerned with the excitation (if' th,!
2p-lovel of' hydro~,,en by electrons iijth total jingillar 1~1()njcntum
L > 0, it is ustial to take into account only the L-1 wave. The
authors report estiwates of the contribution of the scattered
wave with angular tao-meatum L + 1 to the cross-section. The
results of the calculations are given in the following table.
k,at.units',,! Born approx- Distorted wave approximation
irmitions 0 + -
0.9
1.0
Card 1/2
L-1 L+1; L-1 L+1 I L-1 L+ 1 ! L-1 L+l
110-467 0 10.0006 0 10.1-0T _0.000~ 0.299 0.0001
~2,o.o96 c) o.654 - 0.803 o. ooc4 o
;110.439 0 '0.0002 0.001'.0.202 ().oo6j m4o 0.002
:2;0.356 0.0002 1-133 0.001 1.711 0.001 , o.oo4 o.oooi

DAMBURGY R.Ya.; ISTERKOF, R.K.
Excitation of tb!, 2s and 2p levels of the hydrogen atom by
slaw elecU~ons. Zhur. eksp. i teor. fiz. 43 no.5:1765-1768
N 162, (MIRA 15:12)
(Hycb-ogen) (Quantum theory) (ElectOns)

AUTHORSt
TITLEj
PERIODICALt
h3368
6/056j62/043/005/029/058
B1021B104
Damburg, R. Ya., Peterkop, R. K.
Excitation of the 2s and 2p levels of the hydrogen atom by
slow electrons
Zhurnal eksperimentallnoy i teoreticheakoy fiziki, v. 45,
no. 501), 1962, 1765 - 1768
TEXTi As the results obtained among others by Uarriott (Proc. Phys. Soc.
729 121, 1958) and Smith (Phys. Rev. 120, 845, 1960) showed that exchange
effects and also level coupling would play a great role in collisions
between slow electrons and hydrogen atoms, the authors calculated the 28
and 2p excitation cross Eections taking full account of exchange and of all
coupling between le-2s-21). The calculations are carried out for 0