Schematic microscopic approach to the description of M1 transitions between mixed-symmetry and fully symmetric collective states in gamma-soft nuclei based on RPA-IBM boson mapping

作者：Jolos R V^*; Pietralla N; Shirikova N Yu; Voronov V V

来源：Physical Review C, 2011, 84(1): 014315.

DOI：10.1103/PhysRevC.84.014315

A schematic microscopic method is developed to calculate the M1 transition probabilities between the mixed-symmetry and the fully symmetric states in gamma-soft nuclei. The method is based on the random-phase approximation-interacting boson model (RPA-IBM) boson mapping of the most collective isoscalar boson. All other boson modes with higher excitation energies, including the mixed-symmetry boson, are described in the framework of RPA. As an example the M1 transition probabilities are calculated for the (124-134)Xe isotopes and compared with the experimental data. The results agree well with the data for the ratio B(M1; 1(ms)(+) -> 2(2)(+))/B(M1; 1(ms)(+) -> 0(1)(+)). However, the calculated ratio B(M1; 2(ms)(+) -> 2(1)(+))/B(M1; 1(ms)(+) -> 0(1)(+)) shows a significantly weaker dependence on the mass number than the experimental data.

• 出版日期2011-7-15