Bose-Fermi symmetry in the odd-even gold isotopes

作者：Thomas T^*; Regis J M; Jolie J; Heinze S; Albers M; Bernards C; Fransen C; Radeck D

来源：Nuclear Physics A, 2014, 925: 96-111.

DOI：10.1016/j.nuclphysa.2014.02.002

• NUCLEAR REACTIONS Pt-196(p, 2n)
• E=14 MeV
• Measured E gamma, I gamma, gamma gamma-coin
• gamma(theta) using HORUS spectrometer Au-195 deduced levels
• J, pi, branching and mixing ratios
• B(E2). Comparison with IBFM calculations

In this work the results of an in-beam experiment on Au-195 are presented, yielding new spins, multipole mixing ratios, and new low-lying states essential for the understanding of this nucleus. The positive-parity states from this work together with compiled data from the available literature for Au185-199 are compared to Interacting Boson Fermion Model calculations employing the Spin(6) Bose Fermi symmetry. The evolution of the parameters for the tau splitting and the J splitting reveals a smooth behavior. Thereby, a common description based on the Bose Fermi symmetry is found for Au189-199. Furthermore, the calculated E2 transition strengths are compared to experimental values with fixed effective boson and fermion charges for all odd even gold isotopes, emphasizing that the Spin(6) Bose-Fermi symmetry is valid for the gold isotopes.

• 出版日期2014-5