Energy-weighted electronuclear sum rules at constant momentum transfer are studied for light and medium-weight nuclei. For light nuclei exact wave functions obtained with realistic nuclear forces are used, while for heavier nuclei RPA results are obtained using a shell-model basis with effective forces. The Coulomb sum rule is enhanced by exchange forces, its momentum dependence reflects the range of the potential and the two-particle correlations. A multipole decomposition shows that this enhancement is mainly due to the dipole mode. The transverse sum rule is dominated by the spin current, which is also enhanced by exchange forces.
A Study of electronuclear sum rules in light and medium Weight Nuclei
Orlandini, Giuseppina;Traini, Marco Claudio;
1980-01-01
Abstract
Energy-weighted electronuclear sum rules at constant momentum transfer are studied for light and medium-weight nuclei. For light nuclei exact wave functions obtained with realistic nuclear forces are used, while for heavier nuclei RPA results are obtained using a shell-model basis with effective forces. The Coulomb sum rule is enhanced by exchange forces, its momentum dependence reflects the range of the potential and the two-particle correlations. A multipole decomposition shows that this enhancement is mainly due to the dipole mode. The transverse sum rule is dominated by the spin current, which is also enhanced by exchange forces.File in questo prodotto:
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