THE DEPENDENCE OF THE NUCLEAR-CHARGE FORM-FACTOR ON SHORT-RANGE CORRELATIONS AND SURFACE FLUCTUATION EFFECTS

We investigate the effects of fluctuations of the nuclear surface on t he harmonic oscillator elastic charge form factor of light nuclei, whi le simultaneously approximating the short-range correlations through a Jastrow correlation factor. Inclusion of surface-fluctuation effects within this description, by truncating the cluster expansion at the tw o-body part, is found to improve somewhat the fit to the elastic charg e form factor of O-16 and Ca-40. However, the convergence of the clust er expansion is expected to deteriorate. An additional finding is that the surface-fluctuation correlations produce a drastic change in the asymptotic behaviour of the point-proton form factor, which now falls off quite slowly (i.e. as const. x q(-4)) at large values of the momen tum transfer q.