Electromagnetic Properties of the I π = 11/2? isomers in the cadmium isotopes: What can we learn from them?

39th Symposium on Nuclear Physics 2016

Lei, Y.^1 ; Pittel, S.^2 ; Jiang, H.^3,4

Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang

621900, China^1

Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark

DE

19716, United States^2

School of Arts and Sciences, Shanghai Maritime University, Shanghai

201306, China^3

Department of Physics, Shanghai Jiao Tong University, Shanghai

200240, China^4

关键词: Cd isotopes;    Electromagnetic properties;    Hexadecapole;    Linear relation;    Orbitals;    Phase Change;    Shell models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/730/1/012015/pdf
DOI  :  10.1088/1742-6596/730/1/012015

来源: IOP

【 摘 要 】

The electromagnetic features of the 11/2-isomers in the odd-mass Cd isotopes are shown to exhibit an an anomaly near N = 70. We report shell-model calculations of these isotopes aimed at describing these properties. We find a sudden phase change in the hexadecapole component of the wave functions precisely at N = 70, which gives rise to different linear relations between the Q and μ values before and after N = 70, as needed to reproduce the experimental data. The particle-hole transformation properties associated with a strong subshell closure at N = 70 followed by fairly close-lying neutron orbitals from N = 70 - 82 is suggested as a possible explanation for this phase change.