Number projected two-neutron separation energy in the neutron-rich rare-earth region

被引:7
作者
Benhamouda, N. [1 ]
Allal, N. H. [1 ,2 ]
Fellah, M. [1 ,2 ]
Oudih, M. R. [1 ]
机构
[1] USTHB, Fac Phys, Phys Theor Lab, Algiers, Algeria
[2] Ctr Rech Nucl Alger, Algiers, Algeria
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2008年 / 17卷 / 07期
关键词
pairing; particle-number projection; two-neutron separation energy; neutron-rich nuclei;
D O I
10.1142/S0218301308010490
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
The variation of the two-neutron separation energy (S-2N), as a function of the neutron number N, is studied using a microscopic model that includes the pairing effects rigorously within the Fixed-Sharp-BCS method. The model was first tested on "ordinary" nuclei and allowed one to suitably reproduce the experimental data and to confirm the results of previous studies. The model was then applied to the even-even neutron-rich isotopes in the rare-earth region and showed, on the one hand, a relatively important variation of S-2N, when N = 100, that could lead to the assumption of the existence of a new magic number in this region, and on the other hand, a weak variation of S-2N when N > 100. These findings corroborate the previously obtained results for the charge mean square radius and the quadrupole and hexadecapole moments within the same model.
引用
收藏
页码:1357 / 1365
页数:9
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