SCIENTIFIC ABSTRACT IODKO, M.G. - IOFA, B.Z.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000618620009-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 10, 2001
• Sequence Number: 9
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

83708
5/056'60/038/004/001/0.48
BO 193070.
AUTHORS% Romanov, V. A., Iodko, M. G., Tuchkevich, V. V.
TITLEs Long-lived Lutecium Isotopes/7
PERIODICALt Zhurnal eksperimentallnoy i teoreticheakoy Tiziki) 1960,
vol-~ 38, No. 4, pp~ 1019-1026
TEM The authors have studied the conversion spectra of iLu173- and
174
I'm iaotopos. Tito moasuromonts woro mad# with 4k spootro~vkqitor with:
double focusing., Two different sources wer6 udod. $6a-roo:1 WAIt a6peAto.ted
from a Ta target 10-12 hours after it had been exposed to 660 Mev protons
for a quarter of an hour; source rI was separated fv#:~m a Ta target which
was exposed for about three months, Source 11 was used prerioualy by
B~ S. Dzhelepov and others (Refs. 1,2). Most of the conversion lines found
belong to Lu173 whose relative intensities and energries ( ;Table 1) are wIell
known,. The values obtained here agree with those of Yu. G, Bobroy and
others (Ref. 1). The relative intensities of p -rays measured by
G. Y.. Corodinskiy nd others (Ref. 3) and collected in Table 2 are then
Card 1/3

83708
Long-lived Lutecium Isotopes 8/056/60/()38/004/001/048
B019/B070
discussed. The level scheme of Yb 173 (Fig. 2) is disaussed with the help:
of the well known level scheme of Lu173. A number of lines were found in
the long-lived epectr~ of Lu isotopes which do not bolongto LU173, The
energy values of these lines are given in Table 3, and their identificatiom
are discussed in detail. The authors are convinced that they could b6long
only to Lu.174. A possible variant of the decay scheme is discussed with.the
help of Fig. 3. The spins of the excited levels are discussed on the
assumption that the ground state of Lu 174 has either the spin 6- or 1-.
174 71 103
The half life of Lu is 16515 days. The lines found here are attributed
to the Ml and Y13 transitions (Et - 44.7 kev, and E,. - 59.0 kev,
respectively) of the isomeric states of Lu 174. The half life of the
isomeric state is given to be 90 days, The authors thank Professor
V. M. YQltman for his interest in the work and valuable advice. L.,A. Sliv
and I. M. Band (Ref. 4) are mentioned. There are 3 figures, 4 tables'. and
13 references: 6 Soviet, 6 US, and I Dutch,
Card 2/3

83708
Long-lived Lutecium Isotopes S/P56/60/030/004/001/048
B019/B070
ASSOCIATION: Leningradskiy fiziko-tekhnicheskiy inotitut Akademii nauk
SSSR (Leningrad Institute of Ph sic3 and Technology of the
Academy E F-i-e-a . . . ..... U-S-.S-Rj
SUBMITTED: August 7, 1959
Card 3/3

83709
5/056/60/0313/004/002/048
B019/BO70
Z*,61P
AUTHORS% Iodko, M. G., Tuchkevich, V. V., Romanov, V4 A., Kresin, 0-Y,
TITLE: An Investigation of the Relative Intensities of Some
Conversion Lines in the Spectrum of Neutron-deficient
Lu-Izqotop-es~
PERIODICAL: Zhurnal eksperimentallnoy i teoratichezkoy fiziki, 196b,
Vol- 38, No- 4Y PP- 1027-1030
TEXT: The authors have investigated the strong lineu of:bhe conversion
spectrum of the neutron deficient Lu-isotopos by meahs of~a prism
spectrometer. The two sources used here were obtained by separating the
Lu-isotope fraction from a Ta-target,which had been irradiated by 660-11iev
protons. With the first source, the energies and the intensities of'the
conversion lines 66-70 and 75-85 kev in the Lu171 snectruin were mea4ured
172
and 78-70 and 90.55 kev lines in the spectrum of Lu The relative
intensities of the 84,19-kev L-lines in the Lu 170_apectrum, the 87430-kov
L-lines in the Lu 169_ spectrum, and the 181-4 kov L-lines.in the Lu'172-
Card 1/3

83709
An Investigation of the Relative Intensities of S/056/60/036/004/-002/048
Some Conversion Lines in the Spectrum of Neutron- B019/BO70
deficient Lu-Isotopes
spectrum were measured with the second source. An the second source was
very thick, the data obtained with it are to be considered only as rough
values. The energies of the lines were measured by a method developed
earlier by Romanov (Ref. 4). The energies of the conversion lines, anti the
calculated values of the transition energies are given in Table 1. Tho
conversion lines are represented graphically in Fig. 1. The ratios of th e~
L-conversion lines of the transitions with 66-74 and 75-69 kev in the
Lul7l_spectrum are given in Table 2. The analogous ratios'for 78-74 kev-,,
90,66 kev-, and 181.4 kev in the Lul72_spectrum are given.in Table 3.
The theoretical and the experimental values are compared in the tables
2 and 3, and the multiplicities of t-transitions are derived from the
corresponding L-sub-shell intensitiea._L_. A. Sliv and , 11, Pand (Bef.10)
are mentioned. There are 1 figure, 5 tables, and 16 :references: 6 Soviet,
6 US, and 2 Dutch.
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83709
An Investigation of the Relative Intensities of SA56/60/038/004/002/0 48
..Some Conversion Lines in the Spectrum of Neutron- B019/B070
deficient Lu-Isotopes
ASSOCIATIONs, LenMadskiy fiziko-tekhnichaskiy institut Akadomii nauk,
SSSR Leningrad-Institute of Physics arid. Toghpolor-y of*the
Academy of Sciences, USSR)
SUBUTTEDt August 71 1959
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S/048/60/024/012/003/011
B019/BO56
AUTHORS: Tuohkevich, V. V., Romanov, V. A , and Iodko. M. G.
TITLE3 Relative Intensities of 170 and Lu172 Conversion Electrons
PERIODICALs Izvestiya Akademii nauk SSSR. Seriya fizieb ookaya, 1960,
Vol. 24, No. 12, PP. 1457-1464
TEXT: The present paper was read at the 10th All-Union Conference on
Nuclear Spectroscopyp which was held in Moscow from.january 19 to :
January 21, 1960. The authors investigated the relative intensitieslof the
conversion lines by means of a spectrometer with double foeusingj alino
half-width of from 0.25-0-35%, and a solid angle of 0.1_0.2%. Lutecium
fraction, which had been separated from a Ta target irradiated with'
660-Mev protons was used as a source. Table 1 shows'the en6rgies and the
relative intensities of conversion lines in the Yb172 spectrum and the
energies and relative intensities of the Jr -lines, which'h4d been taken
from a paper by Dilman et al. (Ref. 2). On the basis of these data,'the
internal conversion coefficients for a number of transitions were calcu-
lated, and the multiplicities of these transitions could be estimated.
Card 1/6

Relative Intensities of Lu170 and Lu172 SIOOV6010241012100~1011
Conversion Electrons B019/ ",0561
There follows a detailed discussion of these data, and a discussion of
experimental results, which the authors consider to ~be in need of .
improvement. The investigations of the transition energies and the con-
version electron intensities of Yb170, yielded rather inexact resul;js.
Partly, the occurrence of a large numter of weak lines with short half-
lives in the conversion electron spectrum is to blame for this. Table 5
gives the transition energies and the intensities of the conversion lines
of Yb170, the doubtful data being shown in bracketB,. A possible variant'
of the decay scheme is shown in Fig. 2. There are 2.figurest 5 tables,
and 12 referencess 6 Sovieto 5 US, and I Danish.
Text to Table 1: 1) Transition energy; 2), 3), and 4) Con-version line
intensitiesi 5) Energy according to data by Dilman; 6) Intensities
according to data by Dilman in units used by the authors; 7) Conversion
coefficient; 8) Total intensity of conversion lines;
Text to Table 5: 1) Transition energy; 2) and 3) Conversion line
intensities; 4) Total intensity; 5) Multiplicity.
Card 2/_6

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