Abstract
The ground state of the 4He nucleus has been studied using a single-particle phenomenological model. Wave functions are generated from a potential whose parameters are chosen to reproduce the correct neutron separation energy. The proton separation energy electron scattering form factors, dipole photo-absorption cross sections for single-particle emission and dipole sum rule are then calculated. The proton separation energy and dipole sum rule estimates are in satisfactory agreement with experiment. The form-factor calculation agrees with the data for q 2 < 7 fm −2, but an infinitely repulsive core must be added to the central potential in order to reproduce the diffraction dip in the form-factor data at higher momentum transfers. The fit to the photo absorption cross-section data is not good, but residual interactions have been ignored.
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