Quasielastic scattering of 30Si on 208Pb and the quadrupole moments of 2+ levels in 30Si.

Abstract

Quasielastic yields are reported for the $^{30}\mathrm{Pb}$ reaction at ${E}_{\mathrm{lab}{(}^{30}}$Si)=222 MeV. Coupled-channels analysis of the elastic and inelastic scattering results in an excellent description of the experimental data. The static quadrupole moments of the first two ${2}^{+}$ states in $^{30}\mathrm{Si}$ are measured to be -9\ifmmode\pm\else\textpm\fi{}4 e${\mathrm{fm}}^{2}$ and -4\ifmmode\pm\else\textpm\fi{}9 e ${\mathrm{fm}}^{2}$, respectively. The sign of the interference term for the transition between these two states is unambiguously determined to be negative, corresponding to destructive interference. Few-nucleon-transfer reaction data are also presented. Quasielastic processes account for 25% of the total reaction cross section.