Spin of deep-hole states in 111Sn via the [formula omitted] reaction

Abstract

Analyzing powers measured in the study of 112 Sn( d , t) at 40 MeV bombarding energy show strong J-dependence and have been used to clearly assign the spin of a number of low-lying states in the residual nucleus. At high excitation energy (3.5–6 MeV). the inner-hole strength is shared between clearly isolated peaks on one hand and a fragmented structure on the other. This work reports on the determination of the spin of the inner-hole states and consequently on a more precise measurement of the overlapping regions between 1 g 9 2 , 2 p 1 2 , 2 p 3 2 Subshell components. The analyzing power data shows that the group of peaks located between 3.4 and 4.5 MeV consist of spins J = 9 2 + 1 2 , in agreement with the excitation of the 1 g 1 2 and 2 p 1 2 inner- hole strengths in 111Sn. In addition a substantial amount of the 2 p 3 2 component is observed between 4.5 and 6.0 MeV. The results of the data analysis allow us to clearly eastablish the spreading of the 1 g 9 2 innerhole strength and to a lesser extent the strong fragmentation of the 2 p 1 2 and 2 p 3 2 inner-hole subshells.