Signature splitting inversion and backbending in 80Rb
Abstract
High spin states of 80Rb are studied via the fusion-evaporation reactions 65Cu+19F, 66Zn+18O and 68Zn+16O with the beam energies of 75 MeV, 76 MeV and 80 MeV, respectively. Twenty-three new states with twenty-eight new \gamma transitions were added to the previously proposed level scheme, where the second negative-parity band is significantly pushed up to spins of 22^{-} and 15^{-} and two new sidebands are built on the known first negative-parity band. Two successive band crossings with frequencies 0.51 MeV and 0.61 MeV in the \alpha=0 branch as well as another one in the \alpha=1 branch of the second negative-parity band are observed for the first time. Signature inversions occur in the positive- and first negative-parity bands at the spins of 11\hbar and 15\hbar, respectively. The signature splitting is seen obviously in the second negative-parity band, but the signature inversion is not observed. It is also found that the structure of the two negative-parity bands is similar to that of its isotone ^{82}Y. Signature inversion in the positive-parity yrast band with configuration \pi g_{9/2} \otimes \nu g_{9/2} in this nucleus is discussed using the projected shell model (PSM).
Cite
@article{arxiv.1210.5959,
title = {Signature splitting inversion and backbending in 80Rb},
author = {Chuangye He and Shuifa Shen and Shuxian Wen and Lihua Zhu and Xiaoguang Wu and Guangsheng Li and Yue Zhao and Yupeng Yan and Zhijun Bai and Yican Wu and Yazhou Li and Gui Li and Shiwei Yan and M. Oshima and Y. Toh and A. Osa and M. Koizumi and Y. Hatsukawa and M. Matsuda and T. Hagakawa},
journal= {arXiv preprint arXiv:1210.5959},
year = {2015}
}