Intense two-step cascades and gamma-decay scheme of the Sn-118 compound nucleus
J. Honzatko, V. A. Khitrov, C. Panteleev, A. M. Sukhovoj, I. Tomandl
Abstract
Transition energies and intensities of 454 two-step cascades following thermal neutron capture in Sn-117 have been measured. These data allowed us to make more precise and considerably extend the earlier obtained decay scheme of the Sn-118 nucleus. Autocorrelation analysis of the excitation spectrum of intermediate levels of the most intense cascades allowed us to determine the most probable period of their regularity. Besides, the analysis showed impossibility quantitatively to reproduce the total cascade intensity with accounting only for the excitations of the fermion type. This resulted into a conclusion that the excitations of a probable vibrational type in Sn-118 also considerably influence the cascade gamma-decay process practically up to the neutron binding energy.
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