Attractive and repulsive contributions of medium fluctuations to nuclear superfluidity
Nuclear Theory
2009-11-11 v1
Abstract
Oscillations of mainly surface character (S=0 modes) give rise, in atomic nuclei, to an attractive (induced) pairing interaction, while spin (S=1) modes of mainly volume character generate a repulsive interaction, the net effect being an attraction which accounts for a sizeable fraction of the experimental pairing gap. Suppressing the particle-vibration coupling mediated by the proton degrees of freedom, i.e., mimicking neutron matter, the total surface plus spin-induced pairing interaction becomes repulsive.
Keywords
Cite
@article{arxiv.nucl-th/0502077,
title = {Attractive and repulsive contributions of medium fluctuations to nuclear superfluidity},
author = {G. Gori and F. Ramponi and F. Barranco and P. F. Bortignon and R. A. Broglia and G. Colo' and E. Vigezzi},
journal= {arXiv preprint arXiv:nucl-th/0502077},
year = {2009}
}