Description of the Shape Coexistence in ^98Mo with IBM2

• Published in: 中国物理快报：英文版 2015 (6), p.28-31
• Main Author: 张大立 袁书卿 丁斌刚
• Format: Article
• Language: English
• Subjects: 不稳定; 低激发态; 形状共存; 整体变形; 相互作用玻色子模型; 相对能量; 结构指标; 计算结果
• ISSN: 0256-307X; 1741-3540

We investigate the properties of the low-lying states and the relevant shape dynamics of ^98 Mo within the frame- work of the proton-neutron interacting boson model （IBM2）. By considering the relative energy of the d proton boson to be different from that of the neutron bosons, the low-lying levels and the key observable B（E2） transition branching ratios are calculated. The characteristic feature of the energy spectrum and the most crucial available structure indicator indicate that the substantial mixing between the spherical-vibrational and γ-unstable shapes in 9SMo. The calculation results of the overall deformation in ^98Mo are almost the same for both the ground and the first excited 02^＋ states, showing a weak deformation. While the triaxiality parameter indicates that the mostly triaxial shape with some oblate for the ground state, and the triaxial shape with some prolate for the excited 02^＋ state, being equilibrium shapes of spherical-vibrational and γ-unstable in ^98 Mo.