Manifestations of Isospin in Nearest Neighbor Spacing Distributions for the f-p Model Space

Abstract

The strong interactions are charge independent. If we limit ourselves to the strong interactions, we have the isospin $T$ as a good quantum number. Here we consider the lack of level repulsion of states of different isospin and how this effect manifests in nearest neighbor spacing (NNS) histograms, which provide a visual and statistical context in which to study distributions of energy level spacings. In particular, we study nucleons in the f-p model space for the nucleus ${}^{44}$Ti. We also study the effect of the Coulomb interaction on the level spacing distribution.

Comments: 6 pages, 5 figures, typos removed, added comparison with experiment