Original scientific paper

Intense two-step cascades and γ-decay scheme of the 118Sn compound nucleus

Jaroslav Honzátko ; Nuclear Physics Institute, CZ-25068 Rez near Prague, Czech Republic
Valery A. Khitrov ; Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Cvetan Panteleev ; 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
Ivo Tomandl ; Nuclear Physics Institute, CZ-25068 Rez near Prague, Czech Republic

Abstract

Transition energies and intensities of 453 two-step cascades following thermal neutron capture in 117Sn have been measured. The data allowed us to considerably extend previous decay scheme of the 118Sn nucleus and to achieve more precise results. Autocorrelation analysis of the excitation spectrum of intermediate levels of the most intense cascades allowed us to determine most probable period of their regularity. Besides, analysis showed the impossibility to reproduce quantitatively the total cascade intensities taking into account only excitations of the fermion type. The results lead to the conclusion that the excitations of vibrational type considerably influence the cascade g-decay process in 118Sn almost up to the neutron separation energy Sn.

Keywords

thermal neutron capture in 117Sn; two-step cascades; decay scheme of 118Sn nucleus

Hrčak ID:

304373

URI

https://hrcak.srce.hr/304373

Publication date:

1.10.2006.

Article data in other languages: croatian

Visits: 400 *