Neutrino-induced fission and r-process nucleosynthesis

被引：36
|
作者：
Qian, YZ [1 ]
机构：
[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 569卷 / 02期
关键词：
nuclear reactions; nucleosynthesis; abundances; stars : Population II; supernovae : general;
D O I：
10.1086/340643
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An r-process scenario with fission but without fission cycling is considered to account for the observed abundance patterns of neutron-capture elements in ultra-metal-poor stars. It is proposed that neutrino reactions play a crucial role in inducing the fission of the progenitor nuclei after the r-process freezes out in Type II supernovae. To facilitate neutrino-induced fission, the proposed r-process scenario is restricted to occur in a low-density environment, such as the neutrino-driven wind from the neutron star. Further studies to develop this scenario are emphasized.
引用
收藏
页码：L103 / L106
页数：4
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