The isovector imaginary neutron potential: A key ingredient for the r-process nucleosynthesis

被引：40
|
作者：
Goriely, S.
Delaroche, J.-P.
机构：
[1] Univ Libre Brussels, Inst Astron & Astrophys, Brussels, Belgium
[2] CEA, DAM Ile De France, DPTA, Serv Phys, F-91680 Bruyeres Le Chatel, France
来源：
PHYSICS LETTERS B | 2007年 / 653卷 / 2-4期
关键词：
neutron optical potential; Hauser-Feshbach cross section; r-process;
D O I：
10.1016/j.physletb.2007.07.046
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The isovector contribution to the imaginary component of the microscopic optical model potential is adjusted on experimental neutron strength function data. Within the Bruckner-Hartree-Fock approximation of Jeukenne-Lejeune-Mahaux, it is shown that experimental data favours a strong isovector component that can have a drastic impact on the radiative neutron capture cross section for neutron-rich nuclei. If confirmed, this result strongly inhibits the resonant capture by exotic nuclei, so that the traditional r-process picture of the fast neutron captures during the nucleosynthesis r-process needs to be revisited in depth. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：178 / 183
页数：6
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