1School of Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
3Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000
Shell-Model Calculations of β Decays in 18N
ZHANG Yu-Mei1;XU Fu-Rong1,2,3
1School of Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
3Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000
Abstract： We investigate β decays of the neutron-rich nucleus 18N and the structure of the daughter nucleus 18O using the shell model. The reduced transition strengths B(GT) and branching ratios of the β decays in 18N are calculated in the psd and spsdpf} shell spaces with the WBT interaction. The calculations in the two different spaces are compared. The psd calculations obtain a better agreement with the observation of the β-delayed neutron emission, which seems to show that the observed properties of 18N and 18O are mainly produced by one particle being excited from the p-shell to the sd-shell.
2006, Vol. 23 
