Cooper pair sizes in superfluid nuclei in a simplified model

X. Vinas, P. Schuck, N. Pillet

Published 2010-02-07, updated 2010-08-26Version 2

Cooper pair sizes are evaluated in a simple harmonic oscillator model reproducing the values of sophisticated HFB calculations. Underlying reasons for the very small sizes of 2.0-2.5 fm of Cooper pairs in the surface of nuclei are analysed. It is shown that the confining properties of the nuclear volume is the dominating effect. It is argued that for Cooper pair sizes LDA is particularly inadapted.