Magnetic rotation in Rubidium-84  

作　　者：SHEN Shuifa HAN Guangbing WEN Shuxian YAN Yupeng WU Xiaoguang ZHU Lihua HE Chuangye LI Guangsheng 

机构地区：[1]Institute of Nuclear Energy Safety Technology,Chinese Academy of Sciences [2]School of Physics,Suranaree University of Technology [3]Thailand Center of Excellence in Physics (ThEP),Commission on Higher Education [4]State Key Laboratory of Nuclear Physics and Technology (Peking University) [5]School of Physics,Shandong University [6]China Institute of Atomic Energy,P. O. Box 275(10) [7]School of Physics and Nuclear Energy Engineering,Beihang University

出　　处：《Nuclear Science and Techniques》2013年第3期61-65,共5页核技术（英文）

基　　金：Supported by Suranaree University of Technology(No.15/2553);Major State Basic Research Development Program in China(No.2007CB815003);National Natural Science Foundation of China(Nos.10975190,11065001,10975019,10675170,and 61067001);Foundation of the Education Department of Jiangxi Province(No.GJJ12372)

摘　　要：High-spin states in 84 Rb have been studied by using the 70Zn(18O, p3n)84Rb reaction at beam energy of 75MeV. Three regular magnetic dipole bands including strong M1 and weak E2 transitions have been observed in this nucleus which shows the characteristic feature of magnetic rotation. These bands are interpreted in the projected shell model for the first time on the basis of the four-quasiparticle configuration of the type π(fp)π(g29/2)v(g9/2). It is shown that the calculated sequence lies roughly in the same energy range as the experimental one but the interval between neighboring levels is larger than the corresponding experimental value. We believe that a 4-quasiparticle band crossing with the 2-quasiparticle band will depress the energies of the states.High-spin states in 84Rb have been studied by using the ^70Zn（^18O, p3n）^84Rb reaction at beam energy of 75 MeV. Three regular magnetic dipole bands including strong M1 and weak E2 transitions have been observed in this nucleus which shows the characteristic feature of magnetic rotation. These bands are interpreted in the projected shell model for the first time on the basis of the four-quasiparticle configuration of the type π（fp） × π（g^29/2） × v（g9/2） . It is shown that the calculated sequence lies roughly in the same energy range as the experimental one but the interval between neighboring levels is larger than the corresponding experimental value. We believe that a 4-quasiparticle band crossing with the 2-quasiparticle band will depress the energies of the states.

关 键 词：磁旋转 电子束能量 投影壳模型 高自旋态 磁偶极子 E2跃迁 能量范围 时间间隔 

分 类 号：O572.2[理学—粒子物理与原子核物理]