Alternative solvable description of the E(5) critical point symmetry in the interacting boson model

作者：Pan, Feng^*; Zhang, Yu; Xu, Hao-Cheng; Dai, Lian-Rong; Draayer, J. P.

来源：Physical Review C, 2015, 91(3): 034305.

DOI：10.1103/PhysRevC.91.034305

• NUCLEAR COLLECTIVE MODELS
• QUASI-DYNAMIC SYMMETRY
• PHASE-TRANSITIONS
• CLASSICAL LIMIT
• DATA SHEETS

A solvable extended Hamiltonian that includes multipair interactions among s and d bosons up to infinite order within the framework of the interacting boson model (IBM) is proposed to gain a better description of E(5) model results for finite-N systems. Numerical fits to low-lying energy levels and reduced E2 transition rates within this extended version of the theory are presented for various N values. The fits show that the extended Hamiltonian within the IBM provides a better description of the E(5) model results for small-N cases, while the results of the model in the large-N cases are close to those of the E(5)-beta(2n) type models studied previously.

• 出版日期2015-3-3
• 单位辽宁师范大学