Shell-Model Study ofHe4with Realistic Forces

A shell-model study of the $A=4\mathrm{}$ system previously performed with purely central forces was repeated using both the Tabakin and Sussex interactions. Agreement with the experimental spectrum improved. Some shift of the $E1\mathrm{}$ strength to the lower of the 1-, $T=1\mathrm{}$ levels occurred, but the bulk of the strength remained in the state at higher energy. Over-all results achieved with the Sussex interaction were comparable to those obtained using the Tabakin potential.