arXiv subjects
Publications and source records attributed to E. Saperstein.
The microscopic effective pairing interaction in the $^1S_0$-channel is investigated for two different values of the chemical potential $μ$ starting from the separable form of the Paris NN-potential. It is shown that, within a high accuracy, this effective interaction can be approximated by the off-shell free T-matrix taken at the negative energy $E=2μ$.
The $^1S_0$-pairing gap in semi-infinite nuclear matter is evaluated microscopically using the effective pairing interaction recently found explicitly in the coordinate representation starting from the separable form of the Paris NN-potential. Instead of direct iterative solution of the gap equation, a new method proposed by V.A.Khodel, V.V.Khodel and J.W.Clark was used which simplifies the procedure significantly. The gap $Δ$ obtained in our calculations exibits a strong variation in the surface region with a pronounced maximum near the surface.