Original scientific paper
Cascade gamma-decay process of the 177Lu compound nucleus and its peculiarities
Valery A. Khitrov
; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Anatoly M. Sukhovoj
; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Jaroslav Honzátko
; Nuclear Physics Institute, CZ-25068 Řež near Prague, Czech Republic
Ivo Tomandl
; Nuclear Physics Institute, CZ-25068 Řež near Prague, Czech Republic
Georgy Georgiev
; Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria
Abstract
From the mass of γ-γ coincidences registered by a pair of Ge-detectors after thermal neutron capture in 176Lu, the intensity distributions of the two-step cascades proceeding between the compound state and eight low-lying ( 122 ≤ Eex ≤ 637 keV) levels of 177Lu were obtained. The analysis of the intensity distribution of all the cascades resolved experimentally and of the total distribution, including unresolved cascades, showed that the correct description of the cascade γ-decay process for the odd-even deformed nucleus should account for the strong influence of vibrational-type excitations below 3 MeV and an abrupt transition from vibrational to quasiparticle excitations above this energy.
Keywords
Hrčak ID:
303809
URI
Publication date:
1.3.1998.
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