s-process branching atW185revised
s-process branching atW185revised
复制标题
W185 修订的 s 进程分支
DOI：
10.1103/physrevc.69.032801
复制
发表时间：
2004
影响因子：
3.1
通讯作者：
H. Utsunomiya
中科院分区：
文献类型：
--
作者：
P. Mohr;T. Shizuma;H. Ueda;S. Goko;A. Makinaga;K. Hara;T. Hayakawa;Y. Lui;H. Ohgaki;H. Utsunomiya
利用激光康普顿散射的单色光186 W（g，n）~（185）W逆光致衰变的实验数据，导出了不稳定s过程分支核~（185）W的中子俘获截面。在kT = 30 keV时σ = 553 +- 60 mb的结果导致经典s过程中相对较高的有效中子密度N_n = 4.7 × 10^8 cm^-3。热脉冲AGB星的s-过程的一个现实的模型高估了186 Os的丰度显着，因为相对较小的中子俘获截面的185 W。
The neutron capture cross section of the unstable s-process branching nucleus 185W has been derived from experimental data of the inverse 186W(g,n)185W photodisintegration taken with monochromatic photon beams from laser Compton scattering. The result of sigma = 553 +- 60 mb at kT = 30 keV leads to a relatively high effective neutron density in the classical s-process of N_n = 4.7 \times 10^8 cm^-3. A realistic model for the s-process in thermally pulsing AGB stars overestimates the abundance of 186Os significantly because of the relatively small neutron capture cross section of 185W.