Attractive and repulsive contributions of medium fluctuations to nuclear superfluidity

  title={Attractive and repulsive contributions of medium fluctuations to nuclear superfluidity},
  author={G.Gori and F. Ramponi and Francisco Barranco and Pierluigi Bortignon and Ricardo A. Broglia and Gianluca Col{\`o} and E. Vigezzi},
  journal={Physical Review C},
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… 

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