Description of the Rigid Triaxial Deformation at Low Energy in Ge-76 with the Proton-Neutron Interacting Model IBM2

作者：Zhang Da-Li^*; Ding Bin-Gang

来源：Chinese Physics Letters, 2013, 30(12): 122101.

DOI：10.1088/0256-307X/30/12/122101

• BOSON MODEL
• PHASE-TRANSITIONS
• NUCLEAR-SPECTRA
• GAMMA-SOFTNESS
• ATOMIC-NUCLEI
• ISOTOPES

We investigate properties of the low-lying energy states for Ge-76 within the framework of the proton-neutron interacting model IBM2, considering the validity of the Z = 38 subshell closure Sr-88(50) as a doubly magic core. By introducing the quadrupole interactions among like bosons to the IBM2 Hamiltonian, the energy levels for both the ground state and gamma bands are reproduced well. Particularly, the doublet structure of the gamma band and the energy staggering signature fit the experimental data correctly. The ratios of B (E2) transition strengths for some states of the gamma band, and the g factors of the 2(1)(+), 2(2)(+) states are very close to the experimental data. The calculation result indicates that the nucleus exhibiting rigid triaxial deformation in the low-lying states can be described rather well by the IBM2.

• 出版日期2013-12
• 单位湖州师范学院