Magnetic Dipole Strength and the T=0 Proton–Neutron Residual Interaction

Abstract

The impact of the isoscalar proton–neutron (pn) residual interaction on magnetic dipole strength distributions is investigated for the examples ^46,48Ti. Shell-model calculations with different interactions are performed, where either the full set of T=0 two-body matrix elements (TBME) from the FPD6 effective interaction, a set of constant TBME, or no TBME at all are considered. The comparison with experimental data from high-resolution electron scattering reveals clear experimental signatures of the T=0 pn interaction part.