%0 Journal Article
%T High-spin structures of five N=82 isotones: 136Xe, 137Cs, 138Ba, 139La, and 140Ce
%A A. Astier
%A M. -G. Porquet
%A Ts. Venkova
%A D. Verney
%A Ch. Theisen
%A G. Duchene
%A F. Azaiez
%A G. Barreau
%A D. Curien
%A I. Deloncle
%A O. Dorvaux
%A B. J. P. Gall
%A M. Houry
%A R. Lucas
%A N. Redon
%A M. Rousseau
%A O. Stezowski
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevC.85.064316
%X 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.
%U http://arxiv.org/abs/1206.1464v1