SCIENTIFIC ABSTRACT GVOZDEV, V.S. - GVOZDEVA, M.A.

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CIA-RDP86-00513R000617720013-4
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100
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November 2, 2016
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December 31, 1967
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SCIENTIFIC ABSTRACT
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GVOZDEV, V. S., RUSOOV, L. I., FIMIONOV, Yu. I., and KIIAZOV, Yu. L. ',!Investigation of Nuclear Isomerism in Rf 180M " Nuclear Physics , V. 6, (1958) PP. 561-574; (North-Holland Publishing Co., AmsterdamT. - abst: The cogfficient of internal conversion of the 57.6 keV transition in the L-shell of Hf 160m was measured and found to be vQ -_ 0 - 33 4- 0. 10. The ;", -transition is shown to be of the El type. A 501.2 kev-,;-transition has been detected; measurements of the internal conversion coefficient yield-tv-,,~:0-035-i o.ol4. The 501.2 keV -/-transition is of the E3 type. The level with an excitation energy 1 142.9 keV was found to possess a spin 9 and negative parity. The experimental lifetimes for the 57.6 keV and 501.2 keV Y -transition exceed those predicted by the single particle model by respectively 1G" and 10" times. This large diserwpancy is due to the high forbiddenness of the -/-Transitions with respect to the quantum number K. j Internal conversion coefficients have also been measured for/-transitions Bf 93.3 keV, 216 keV, 332.4 keV and 443.6 keV energy. The transitions )(_ere all found to be of the E2 type. The cross section for production of Rflwmin the (n,~,') reaction has been determined and found to equal-"-.--0.18-i_0-07 barns. Phyrsico-Tech. Inst, Acad. Sci. US" -"R 2 j (8) SOV/56-306 -2 -5 2/O/_ .aUTHORS: Gvozdev, V. S., Khazov, Yu. L. TITLE: The Production Cross Section of Te125m Accordin,- to a (n.,j) Reaction (Secheniye obrazovaniya To 125m po reakteii (nj7)) PERIODICAL: Zhurnal eksperimeritallnoy i tooreticheskoy fiziki, 1959, Vol 36, N'r 2, pp 632-633 (USSR) ABSTRACT: The authors measured the formation cross section of the i4soneric state of Te 125 of the spin 11/2, the (n,Y) re;-.-ction was used for this measurement. The above-mentioned cross section was determined by comparing with the cross secl;ion of the reaction IT f180 181 - (n,Y)Iff which was assumed to be equal to (10 + 3) barn. The radiation sources for the measurements were prepared from the separated isotopes*Te124 and Iff'", they simultaneous- ly were irradiated in a neutron flow. The spectrum of the electrons of the internal conversion of T125M and Ta'81 (which are produced in the P -decay of 11081) was investit,-ated by means of a P-opectrometer. A diagram shovio, the K-lines of the internal -c onvers ion electrons of the y-trunsitiors of Card 1/2 181 125r- Ta . (133.02; 136.25; and 136-85 kev) and of Te (100,.1 kev). 'The Production Cross Section of Te 1251A sOV/1)6-36-2-1j2/63 Accordin- to a (n,y), Reaction 12511 The production cross section of Te accordinT to the reaction (n,y) can be calculated by determininj the ratio of the intensities of the lines K 109.1 and K = 133-02 it was equal to (40 + 25) millibarn. "he ratio ol the forma- -~f T~125m 25 'spin 1 12) tion cross sections spin 11/2) and Te amounted to 0.006. There are 1 fi.:,ure and 2 references. ASSOCIATION: Leninggradskiy fiziko-teklinicheski.- in~-titut Akademiii nauk SSSR (LeninF~rad Physico-Technical Instituteof the Academy of Sciences, USSR) SUBMITTED: Nove.-,,iber 6, 195B Card 2/2 silo f0-7_1 /1- 12 B 0 1 9 'B 0, 5 6 AUTHORS: Gvozdev, V,. 3 ',ER ~usinov, IL._IJ(Deceased), and Khazov, Yu,L TITLE; Study of the W 182 Level Scheme _~77_ PERIODICAL: Izvestiya Akademii nauk SSSR_ Serlya fizicheskaya, 1.960, Vol.. 24, No. 12, pp. 1444--1448 TEXT: The present paper was read at the 10th All-Union Conference on Nuclear S2ectroscopy.. which was held in Moscow from January 1 to January 27, 1960. For the study of highly excited W182 levels, the internal conversion coefficients of a number of f-transitions were determined. The excited W 182 levels were obtained from the f -decay of Ta 182 .(half-life III dayo), which had been obtained from the reaction 18 1 ry 182 Ta (n,t)Ta . The meaaurements were made with a P-spectrometer with a _11F2_focusing of electrons, In order to avoid an action of the TU183 produced in the above-mentioned Ta de-ay (half-life, five days), the measurements were carried out 40 days after neutron bombardment, For Card 1/4 Study of the W 182 Level Scheme S10481601'():'410121'OC,11!~~)11 B019/BO5'6 energies of the internal conversion electrons of up to 100 kev, sources having a thickness of 0.5 mg.,cm-2 for energies of from 1000 to 1200 kev -2 with 1.7 mg.cM , and for 820-960 kev, such having it thickneo-,, of 13 mg~cm_2 were used. A conversion line was found, which is --lose to an electron energy of 1088.8 kev,. The authors conclude. that, an excitatLon energy of 1255 kev must be ascribed to the level , from which a jk -tran.-II tion with an energy of 1158.3 ki~v occurs., The internal conversion co- efficients were obtained by comparing the intennities of the converaion electrons and the --emission of the -transitions con, q.idered with those of the conversion electrons and the radlation of the 1222-kev transi- tion . The conversion coefficients and the multiplicities of' the W 182 transitions are given in Table 1. Table 2 shows a comparison between the experimental and theoretical relations of the p -transition probabilities B(E2). D~ A. Varshalovich is thanked for a discussion.. There are 4 figures, 2 tables, and 10 references; 6 Soviet, 5 US, and I Danish, Card 2/4 182 Study,* of the Level Scheme ASSOCIATION: Fiziko-tekhnicheskiy institut Akademil nauk SSSR (IRntitute of Ph sics and Technology ok the Academy,of Sciences EZR Text,'to Table 1: 1) Tra Insition energy; 2) Theoretical value of the con- vers:4on coefficients; 4) tntens.4ty of the conversion electrons; 5) Iritensity of y-radiation; 6) Experimental values of the conversion coefticients; 7) Multipli6ities. Ta6zinrta 2 CpaBnenne 11 V01wnrucitux oTnowenstfl nPitnewoutwx x1ep-10MA 1-nepexopa c oCmero ypowin 0 7clop(MilleCIMUH /1 Z)ITeprim D03- MAMR,2 3tieprnn 67 Tpocall Y-ftepexoAn. (k, curtit U keV qeynocn S/048/60/024/012/C01/011 B019/B056 Catin it -IMIOCTh T3,lbt?Oe COOT- P011C4110ro Howetit COCTOR1111H B (Ega B(=) no POOTam no nPatittay Asarn K-0 K-1 IC-2 1222 893 A+