Abstract
A theoretical investigation of isoscalar electric-dipole excitations in self-conjugate nuclei by electron inelastic scattering is developed. The strongly excited isoscalar dipole states can be understood by means of a semi-classical model, where a relative motion of two interpenetrating isoscalar parts with isotropic shapes is assumed. Also it is pointed out that the Yennieet al. approximation for a large-angle scattering is reasonably applicable to our case. Finally it is shown that the isospin mixing affects Coulomb form factors in the region of a small momentum transfer appreciably.
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