Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui, Hefei, 230031, PR China; University of Science and Technology of China, Anhui, Hefei, 230027, PR China; School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fujian, Fuzhou, 350118, PR China; School of Intelligent Manufacturing, Zhejiang Guangsha Vocational and Technical University of Construction, Zhejiang, Jinhua, 322100, PR China; School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand; Thailand Center of Excellence in Physics (ThEP), Commission on Higher Education, 328 Si Ayutthaya Road, Ratchathewi, Bangkok, 10400, Thailand; Corresponding author. Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui, Hefei, 230031, PR China.
Feipeng Wang
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui, Hefei, 230031, PR China; University of Science and Technology of China, Anhui, Hefei, 230027, PR China
Jiejie Shen
Division of Health Sciences, Hangzhou Normal University, Zhejiang, Hangzhou, 310012, PR China
Guangbing Han
School of Physics, Shandong University, Shandong, Jinan, 250100, PR China
Shuxian Wen
China Institute of Atomic Energy, P. O. Box 275(10), Beijing, 102413, PR China
Yupeng Yan
School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand; Thailand Center of Excellence in Physics (ThEP), Commission on Higher Education, 328 Si Ayutthaya Road, Ratchathewi, Bangkok, 10400, Thailand
Xiaoguang Wu
China Institute of Atomic Energy, P. O. Box 275(10), Beijing, 102413, PR China
Lihua Zhu
School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, PR China
Chuangye He
China Institute of Atomic Energy, P. O. Box 275(10), Beijing, 102413, PR China
Guangsheng Li
China Institute of Atomic Energy, P. O. Box 275(10), Beijing, 102413, PR China
High-spin states in 84Rb are studied by using the 70Zn(18O, p3n)84Rb reaction at a beam energy of 75 MeV. Three high-lying negative-parity bands are established, whose level spacings are very regular, i.e., there is no 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 analogy with multiparticle excitations in neighboring nuclei. Strong M1 and weak or no E2 transitions are observed. All these characteristic features show they are magnetic rotational bands.
