Calculation of astrophysical reaction rate of 82Ge(n,γ)83Ge
The neutron capture reaction on a neutron-rich near closed-shell nucleus 82Ge may play an important role in the r-process following the fallout from nuclear statistical equilibrium in core-collapse supernovae.By carrying out a DWBA analysis for the experimental angular distribution of 82Ge(d, p)83Ge reaction we obtain the single particle spectroscopic factors, S2,5/2 and S0,1/2 for the ground and first excited states of 83Ge=82Ge(⊕)n, respectively. And then these spectroscopic factors are used to calculate the direct capture cross sections for the 82Ge(n, γ)83Ge reaction at energies of astrophysical interest. The optical potential for neutron scattering on unstable nucleus 82Ge is not known experimentally. We employed a real folding potential which was calculated by using the proper 82Ge density distribution and an effective nucleon-nucleon force DDM3Y. The neutron capture reactions on neutron-rich closed-shell nuclei are expected to be dominated by the direct capture to bound states. We will show that the direct capture rates on these nuclei are sensitive to the structure of the low-lying states.
neutron capture, spectroscopic factor, astrophysical reaction rate
WANG Mian CHEN Yong-Shou LI Zhi-Hong LIU Wei-Ping SHU Neng-Chuan
China Institute of Atomic Energy, Beijing 102413, China
国际会议
重庆
英文
79-81
2008-05-10（万方平台首次上网日期，不代表论文的发表时间）