Isospin Dependent Pairing Interactions and BCS-BEC crossover

被引：0

作者：

Sagawa, H. ^{[1
]}

Margueron, J. ^{[2
]}

Hagino, K. ^{[3
]}

机构：

[1] Univ Aizu, Ctr Math & Phys, Fukuyama, Hiroshima 9658580, Japan

[2] Univ Paris 11, CNRS, Inst Phys Nucl, IN2P3, F-91406 Orsay, France

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

NUCLEAR PHYSICS AND ASTROPHYSICS | 2008年 / 1072卷

关键词：

Pairing correlations; BCS-BEC crossover;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose new types of density dependent contact pairing interaction which reproduce the pairing gaps in symmetric and neutron matters obtained by a microscopic treatment based on the realistic. nucleon-nucleon interaction. The BCS-BEC crossover of neutrons pairs in symmetric and asymmetric nuclear matters is studied by using these contact interactions. It is shown that the bare and screened pairing interactions lead to different features of the BCS-BEC crossover in symmetric nuclear matter. We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and N=20, 28, 50 and 82 isotones using these density-dependent pairing interactions. Our calculations well account for the experimental data for the neutron number dependence of binding energy, two neutrons separation 1 energy, and odd-even mass staggering of these isotopes. Especially the interaction IS+IV Bare without the medium polarization effect gives satisfactory results for all the isotopes.

引用

页码：142 / +

页数：2