Five-valence-proton N=82 isotone Cs-137

Citation
R. Broda et al., Five-valence-proton N=82 isotone Cs-137, PHYS REV C, 59(6), 1999, pp. 3071-3075
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
59
Issue
6
Year of publication
1999
Pages
3071 - 3075
Database
ISI
SICI code
0556-2813(199906)59:6<3071:FNIC>2.0.ZU;2-O
Abstract
Yrast excitations in the N = 82 isotone Cs-137 have been identified for the first time in thick-target gamma-ray coincidence measurements for the syst em Th-232+Xe-136 using the Gammasphere array. The Cs-137 nuclei were produc ed in deep inelastic one-proton-transfer reactions. By-products of the main investigation were two well-developed rotational bands which were identifi ed in heavy reaction partner products complementary to Cs-137 and are tenta tively assigned to the little studied nucleus Ac-231. There was no difficul ty in placing the 11 observed Cs-137 transitions in a yrast level scheme ex tending to an I-pi = (31/2(-)) level at 5494 keV. Interpretation was also s traightforward, since the experimental level energies are in close agreemen t with results of shell model calculations performed earlier using empirica l single particle energies and interaction matrix elements derived from exp erimental data for other N = 82 isotones.