Effect of pairing correlations on nuclear low-energy structure: BCS and general Bogoliubov transformation
Abstract
Low-lying nuclear states of Sm isotopes are studied in the framework of a collective Hamiltonian based on covariant energy density functional theory. Pairing correlation are treated by both BCS and Bogoliubov methods. It is found that the pairing correlations deduced from relativistic Hartree-Bogoliubov (RHB) calculations are generally stronger than those by relativistic mean-field plus BCS (RMF+BCS) with same pairing force. By simply renormalizing the pairing strength, the diagonal part of the pairing field is changed in such a way that the essential effects of the off-diagonal parts of the pairing field neglected in the RMF+BCS calculations can be recovered, and consequently the low-energy structure is in a good agreement with the predictions of the RHB model.
Keywords
Cite
@article{arxiv.1312.0431,
title = {Effect of pairing correlations on nuclear low-energy structure: BCS and general Bogoliubov transformation},
author = {J. Xiang and Z. P. Li and J. M. Yao and W. H. Long and P. Ring and J. Meng},
journal= {arXiv preprint arXiv:1312.0431},
year = {2015}
}
Comments
5 figures, 5 pages