Cross sections of the W-186, Re-187, Os-188(gamma,n) reactions were measured using quasimonochromatic photon beams from laser Compton scattering with average energies from 7.3 to 10.9 MeV. The results are compared with the predictions of Hauser-Feshbach statistical calculations using four different sets of input parameters. In addition, the inverse neutron capture cross sections were evaluated by constraining the model parameters, especially the E1 strength function, on the basis of the experimental data. The present experiment helps to further constrain the correction factor F-sigma for the neutron capture on the 9.75 keV state in Os-187. Implications of F-sigma for the Re-Os cosmochronology are discussed with a focus on the uncertainty in the estimate of the age of the galaxy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据