Neutron-proton pairing in the BCs approach

被引：78

作者：

Civitarese, O ^{[1
]}

Reboiro, M ^{[1
]}

Vogel, P ^{[1
]}

机构：

[1] CALTECH, DEPT PHYS 161 33, PASADENA, CA 91125 USA

来源：

PHYSICAL REVIEW C | 1997年 / 56卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.56.1840

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 investigate the BCS treatment of neutron-proton pairing involving time-reversed orbits. We conclude that an isospin-symmetric Hamiltonian, treated with the help of the generalized Bogolyubov transformation, fails to describe the ground state pairing properties correctly. In order for the np isovector pairs to coexist with the like-particle pairs, one has to break the isospin symmetry of the Hamiltonian by artificially increasing the strength of the np pairing interaction above its isospin-symmetric value. We briefly discuss the prescription how to choose the coupling constant of this auxiliary isospin-breaking pairing force.

引用

页码：1840 / 1843

页数：4

共 19 条

[11] ISOSPIN INVARIANCE AND PAIRING-FORCE PROBLEM [J].