Original scientific paper
A search for the g-decay of the 168Er compound nucleus in the (n,2g) reaction
Evgeny P. Grigoriv
; Research Institute of Physics, St.-Peterburg State University, Russia
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
Ella V. Vasilieva
; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Abstract
The information derived from the spectra of two-step γ-cascades proceeding between the compound state of 168Er and its low-lying (Ef < 1.1 MeV) levels is analysed. The data on the most intensive cascades resolved experimentally were used to verify and make more precise the already known decay scheme of this nucleus and to extend it to higher excitation energies. The degree of its completeness was estimated numerically for a decay scheme of 91 levels with Eex < 3.14 MeV. Total intensities of all cascades (including those unresolved experimentally which form continuous parts of the experimental spectra) were used for testing the models which attempt to explain and describe the cascade γ-decay process in the excitation energy diapason up to the neutron binding energy Bn.
Keywords
168Er compound state; two-step γ-cascades; low-lying (Ef < 1.1 MeV) levels; total intensities
Hrčak ID:
303855
URI
Publication date:
1.10.2000.
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