ASTIER, A.; PORQUET, M. -G.; VENKOVA, Ts.; VERNEY, D.; THEISEN, Ch.; DUCHENE, G.; AZAIEZ, F.; BARREAU, G.; CURIEN, D.; DELONCLE, I.; DORVAUX, O.; GALL, B. J. P.; HOURY, M.; LUCAS, R.; REDON, N.; ROUSSEAU, Marc; STEZOWSKI, O.

doi:10.1103/PhysRevC.85.064316

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

ASTIER, A.
CSNSM SNO

PORQUET, M. -G.
CSNSM SNO

VENKOVA, Ts.
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse [CSNSM]

Langue

Article de revue

Ce document a été publié dans

Physical Review C. 2012, vol. 85, p. 064316

American Physical Society

Résumé en anglais

Five N=82 isotones have been produced in two fusion-fission reactions and their gamma-rays studied with the Euroball array. The high-spin states of 139La have been identified for the first time, while the high-spin yrast and near-to-yrast structures of the four others have been greatly extended. From angular correlation analysis,spin values have been assigned to some states of 136Xe and 137Cs. Several cascades involving gamma-rays of 139La have been found to be delayed, they deexcite an isomeric state with T1/2= 315(35) ns located at 1800-keV excitation energy. The excited states of these five N=82 isotones are expected to be due to various proton excitations involving the three high-j subshells located above the Z=50 shell closure. This is confirmed by the results of shell-model calculations performed in this work. In addition, high-spin states corresponding to the excitation of the neutron core have been unambiguously identified in 136Xe, 137Cs, and 138Ba.< Réduire

Métadonnées

Licence d’utilisation du document

High-spin structures of five N=82 isotones: 136Xe, 137Cs, 138Ba, 139La, and 140Ce

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche