RHO-MESON COUPLING IN THE RELATIVISTIC MEAN-FIELD THEORY AND DESCRIPTION OF EXOTIC NUCLEI

被引：599
|
作者：
SHARMA, MM [1 ]
NAGARAJAN, MA [1 ]
RING, P [1 ]
机构：
[1] TECH UNIV MUNICH, DEPT PHYS, W-8046 GARCHING, GERMANY
来源：
PHYSICS LETTERS B | 1993年 / 312卷 / 04期
关键词：
D O I：
10.1016/0370-2693(93)90970-S
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The role of the isovector rho-meson coupling on the symmetry energy in the relativistic mean-field theory has been investigated. In a multi-dimensional parameter search for an appropriate force within the framework of the non-linear sigmapmegarho model the rho-meson coupling has been found to have a significant effect on the neutron skin of nuclei. It has been shown that a low value of rho-meson coupling strength remedies the defect of some of the existing parameter sets of providing a higher neutron skin thickness of nuclei. An extraordinarily good description of highly proton- as well as neutron-rich exotic nuclei has been found. It has been observed that the proper description of both proton-rich and neutron-rich nuclei is sensitive to the symmetry energy.
引用
收藏
页码：377 / 381
页数：5
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