Study of the ReactionNe20(h,h0,1,2)Ne20at 17.83 MeV

Angular distributions for the scattering of helions to the $0^{+}$, $2^{+}$, and $4^{+}$ members of the ground-state rotational band of ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ were measured at 17.83 MeV. An optical-model analysis of the elastic scattering was performed as well as a coupled-channels analysis of the inelastic data. Good agreement between the coupled-channels calculations and the experimental data was found for the $2^{+}$ data, with ${\beta }_2$ in the range 0.42 to 0.48. These calculations gave a poor description of the $4^{+}$ data, but from the shape of the angular distributions an upper limit of 0.05 for ${\beta }_4$ was assigned.