The s-Process Branching at 185W
The s-Process Branching at 185W
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185W 的 s-Process 分支
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
R. Gallino
中科院分区：
文献类型：
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作者：
K. Sonnabend;P. Mohr;K. Vogt;A. Zilges;A. Mengoni;T. Rauscher;H. Beer;F. Kaeppeler;R. Gallino;R. Gallino
根据186 W（γ，n）185 W逆反应的光活化实验数据，导出了不稳定核185 W的中子俘获截面。σ = 687 ± 110 mbarn的新结果证实了理论上预言的σ = 700 mbarn在kT = 30 keV时的185 W中子俘获截面。由185 W分支的新数据导出了经典s过程的中子密度nn = × 108 cm ~（-3）。在一个恒星s过程模型中，人们发现剩余的s-唯一的核186 Os的显着过剩生产。
The neutron capture cross section of the unstable nucleus 185W has been derived from experimental photoactivation data of the inverse reaction 186W(γ, n)185W. The new result of σ = 687 ± 110 mbarn confirms the theoretically predicted neutron capture cross section of 185W of σ ≈ 700 mbarn at kT = 30 keV. A neutron density in the classical s-process of nn = × 108 cm-3 is derived from the new data for the 185W branching. In a stellar s-process model, one finds a significant overproduction of the residual s-only nucleus 186Os.