Nuclear shell effects near the r-process path in the relativistic Hartree-Bogoliubov theory -: art. no. 044301

被引：16
|
作者：
Sharma, MM [1 ]
Farhan, AR [1 ]
机构：
[1] Kuwait Univ, Dept Phys, Safat 13060, Kuwait
来源：
PHYSICAL REVIEW C | 2002年 / 65卷 / 04期
关键词：
D O I：
10.1103/PhysRevC.65.044301
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We have investigated the evolution of the shell structure of nuclei in going from the r-process path to the neutron drip line within the framework of the relativistic Hartree-Bogoliubov (RHB) theory. By introducing the quartic self-coupling of omega meson in the RHB theory in addition to the nonlinear scalar coupling of sigma meson, we reproduce the available data on the shell effects about the waiting-point nucleus Zn-80. With this approach, it is shown that the shell effects at N=82 in the inaccessible region of the r-process path become milder as compared to the Lagrangian with the scalar self-coupling only. However, the shell effects remain stronger as compared to the quenching exhibited by the HFB+SkP approach. It is also shown that in reaching out to the extreme point at the neutron drip line, a terminal situation arises where the shell structure at the magic number is washed out significantly.
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页数：8
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