Alpha-Decay Study of Unfavored Transitions in Bismuth Isotopes
NI Dong-Dong1**, REN Zhong-Zhou1,2,3
1Department of Physics, Nanjing University, Nanjing 210093 2Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000 3Kavli Institute for Theoretical Physics, Chinese Academy of Sciences, Beijing 100190
Abstract：The unfavored α transitions of bismuth isotopes, including the newly observed α-decay fine structure in 209Bi [Beeman et al., Phys. Rev. Lett. 108 (2012) 062501] are investigated by the generalized density-dependent cluster model (GDDCM). Instead of the Wentzel–Kramers–Brillouin barrier penetration probability, the exact solution of the Schr?dinger equation under outgoing Coulomb wave boundary conditions is presented. The calculated α-decay half-lives are found to be in good agreement with the experimental data for both odd-A and odd-odd nuclei. This indicates that the GDDCM has good applicability for unfavored α transitions in addition to favored ones. Some predictions on α-decay half-lives are also made for reference in future experiments.
2013, Vol. 30 
