Quasi-elastic scattering of polarized electrons on polarized ³He

Cross sections and asymmetries for quasi-elastic scattering of longitudinally polarized electrons on polarized ³He are calculated. The model used consists of impulse approximation plus closure approximation to sum over final states. At the quasi-elastic peak the asymmetry is found to be dominated by scattering from the neutron, and judicious choice of target polarization allows sensitivity to either the neutron's electric or magnetic form factor to be maximized. Away from the quasielastic peak, the protons contribute to the asymmetry. The proton's contribution is mainly owing to two partial wave channels, one mixed symmetry S state and one D state which have small total probability in the ³He wave function.