Level scheme of 194Ir

M. Balodis, P. Prokofjevs, N. Kramere, L. Simonova, J. Berzinš, T. Krasta, J. Kern, A. Raemy, J. C. Dousse, W. Schwitz, Jolie Cizewski, G. G. Colvin, H. G. Boerner, P. Geltenbort, F. Hoyler, S. A. Kerr, K. Schreckenbach, R. Georgii, T. Von Egidy, J. KloraH. Lindner, U. Mayerhofer, A. Walter, A. V. Murzin, V. A. Libman, I. A. Kondurov, Yu E. Loginov, P. A. Sushkov, S. Brant, V. Paar, V. Lopac

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Abstract

Levels of 194Ir were studied using neutron capture and (d, p) reaction spectroscopy. A pair spectrometer was used to measure the high-energy γ-ray spectrum from thermal-neutron capture in an enriched 193Ir target over the energy range 4640-6100 keV. From the same reaction, low-energy γ-radiation was studied using curved-crystal spectrometers, and conversion electrons were observed with magnetic spectrometers. Prompt and delayed γγ-coincidences were measured using semiconductor and scintillation detectors. Averaged resonance capture measurements were performed with 2 keV and 24 keV neutrons for primary transitions leading to excitation energies from 0 to 580 keV. Using 22 MeV deuterons, the 193Ir(d, p) high resolution spectra were observed with a magnetic spectrograph. The deduced nuclear level scheme of 194Ir includes 38 levels connected by 184 transitions. Unambiguous spins and parities were determined for 25 levels. The rotor-plus-particle model was used for the interpretation of the level scheme assuming a strong mixing for Nilsson configurations having identical parities and K quantum numbers. IBFFM model calculations were performed and the obtained results were compared with the experimental level scheme.

Original languageEnglish (US)
Pages (from-to)133-187
Number of pages55
JournalNuclear Physics A
Volume641
Issue number2
DOIs
StatePublished - Oct 12 1998

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

  • Ir(n, γ), E = 2 keV, 24 keV
  • Measured E, I, E(ce), I(ce), γγ-coincidences
  • Nuclear reaction Ir(n, γ), E = thermal

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