s-particle doublets in certain light nuclei

Abstract

The splitting of an s-particle doublet in B11 is examined to see what information it gives about the effective 1p-2s shell model interaction and it is concluded that the small splitting is explainable by an interaction whose spin dependence is primarily of s1 · s2t1 · t2 nature. Certain other s-doublets of the “hole-particle” typed are considered too and their small splitting appears to show that the spin dependence of the effective n-p interaction between inequivalent nucleons is weaker than normally assumed. A very simple procedure is used to evaluate the interaction energies.