Isobaric multiplet yrast energies and isospin non-conserving forces

A. P. Zuker (1) , S. M. Lenzi , G. Martinez-Pinedo , A. Poves

1 IReS - Institut de Recherches Subatomiques

The isovector and isotensor energy differences between yrast states of isobaric multiplets in the lower half of the $pf$ region are quantitatively reproduced in a shell model context. The isospin non-conserving nuclear interactions are found to be at least as important as the Coulomb potential. Their isovector and isotensor channels are dominated by J=2 and J=0 pairing terms, respectively. The results are sensitive to the radii of the states, whose evolution along the yrast band can be accurately followed.

Domaines: Physique Nucléaire Théorique [nucl-th]

A. P. Zuker, S. M. Lenzi, G. Martinez-Pinedo, A. Poves. Isobaric multiplet yrast energies and isospin non-conserving forces. Physical Review Letters, 2002, 89, pp.142502. ⟨10.1103/PhysRevLett.89.142502⟩. ⟨hal-00007566⟩