Mixed symmetry states in even-even Mo96-108 nuclei

作者：Zhang JF^*; Al Khudair HF; Long GL; Zhu SJ; Ruan D

来源：Communications in Theoretical Physics, 2002, 37(3): 335-340.

• IBM-2
• even-even Mo
• excitation energies
• electromagnetic transition
• mixed symmetry states

Excitation energies and electromagnetic transition strengths in even-even Mo96-108 nuclei have been described systematically by using the proton-neutron interacting boson model (IBM-2). It appears that the properties of low-lying levels in these isotopes, for which the comparison between experiment and theory is possible, can be satisfactorily described by the IBM-2 model, provided proper account is taken of the presence at low energy of states having a mixed-symmetry character. It seems possible to identify, in each isotope, a few states having such a character, the lowest ones being either 2(2)(+) or 2(3)(+) levels. It is found that these nuclei are in the transition from U(5) to SU(3).

• 出版日期2002-3-15
• 单位清华大学; 内蒙古师范大学