High-spin states in 84Rb are studied by using the 70Zn(18O, p3n)84Rb reaction at beam energy of 75 MeV. Three high-lying negative-parity bands are established, whose level spacings are very regular, i.e., there don't exist signature splitting. The dipole character of the transitions of these three bands is assigned by the γ-γ directional correlations of oriented states (DCO) intensity ratios and the multipolarity M1 is suggested by the analogy to multiparticle excitations in neighboring nuclei. The strong M1 and weak or no E2 transitions are observed. All these characteristic features show they are magnetic rotation bands.
@article{arxiv.1606.08173,
title = {Three Magnetic Rotation Bands in 84^Rb},
author = {Shuifa Shen and Xin Zhao and Guangbing Han and Shuxian Wen and Yupeng Yan and Xiaoguang Wu and Lihua Zhu and Chuangye He and Guangsheng Li},
journal= {arXiv preprint arXiv:1606.08173},
year = {2016}
}