FIZIKA B 7 (1998) 1, 15-36
STUDY OF 194Ir VIA THERMAL NEUTRON CAPTURE AND (d,p) REACTIONS
M. BALODIS, P. PROKOFJEVS, N. KRAMERE, L. SIMONOVA, J. BERZINS, T.
R. GEORGII, T. von EGIDY, J. KLORA, H. LINDNER, U. MAYERHOFER, A.
J. A. CIZEWSKI,
G. G. COLVIN, H. G. BOERNER, P. GELTENBORT, F. HOYLER, S. A. KERR, K.
A. RAEMY, J. C. DOUSSE, J. KERN, W. SCHWITZ,
I. A. KONDUROV, YU. E. LOGINOV, P. A. SUSHKOV,
S. BRANT, V. PAAR
and V. LOPAC
Received 28 August 1997; Accepted 11 May 1998
Levels of 194Ir were studied using thermal neutron capture reaction. A pair spectrometer was used to measure the high-energy g-ray spectrum from thermal-neutron capture in enriched 193Ir target over the energy range 4640 - 6100 keV. The low-energy g-radiation from the reaction was studied with crystal diffraction spectrometers, and conversion electrons were observed with magnetic spectrometers. The high-sensitivity measurements at the Grenoble reactor, evaluated for transition energies up to 500 keV, are compared with lower-sensitivity measurements at the Wuerenlingen and Salaspils reactors. The comparison helped to obtain reliable isotopic identification for a number of 194Ir lines. The multipolarity admixtures for 29 g-transitions were determined on the basis of conversion lines from different electron subshells. Prompt and delayed g-g coincidences were measured using semiconductor and scintillation detectors. The 193Ir(d,p) high-resolution spectra, observed with a magnetic spectrometer, are given. All these data contributed to establishing a detailed level scheme of 194Ir. Additional data and the interpretation of the results in terms of current models will be presented in a forthcoming paper.
PACS numbers: 21.10-k, 23.20Lv, 27.80+w
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