(P,Psup(1) gamma ) Angular Correlation Study of an Intermediate Structure in the 3 exp - Exit Channel of exp 40 Ca+p

摘要

Excitation functions of the exp 40 Ca(p,p sub 2 gamma ) triple angular correlations have been measured in the region of an intermediate structure centered at Esub(p) = 6.25 MeV, for 12 pairs of proton and gamma positions. On the peaks of the main components of the intermediate structure the number of these combinations amounted to 32. The angular correlations measured in the Goldfarb-Seyler geometry are consistent with the spin 5/2 assigned for these resonances. An analysis of all the angular correlation data has established the psub(1/2) partial wave as the main decay mode of the intermediate structure in the 3 exp - inelastic channel. These results are strongly supporting the description of the structure observed in the 3 exp - exit channel as consisting of 2p-1h doorway states in which a 2psub(1/2) single-particle state weakly coupled to 3 exp - excited core is split by residual interactions. An improved dynamical treatment, aimed to obtain the strength function of the 2psub(1/2) single-particle state in the 3 exp - channel, is suggested. (Atomindex citation 11:496057)