Photodisintegration of 4 He and the Supermultiplet Potential Model of Cluster-Cluster Interactions

Abstract

p+3H and p+3He elastic collisions are described in terms of a supermultiplet model with [ƒ]-dependent potentials. The phase shifts δ [ƒ] L,t,S (E) with [ƒ] = [4], t = S = 0, L = even are reconstructed from the observable nuclear phase shifts δ L,S (E) of the above collisions. So, the initial-state interaction V [4] L,0,0 (R) of the 4He +Υ→3H +p(3He +n) reaction can be found unambiguously, while the final-state interaction V [31] L, 1, 0 (R) is defined by the observablesδ L,0 (E) of p+3He scattering. The data on the proton momentum distribution in 4He and on the charge-exchange reaction 3H +p→3He +n confirm the model. In calculating the above photonuclear reactions, in addition to the initial-state and final-state antisymmetrizations, preserving the corresponding symmetry [ƒ], the nucleon-nucleon correlations in the 3H (3He) subsystem were also taken into account. The results are in good agreement both with recent experimental data and theoretical investigations by sofianos, Fiedeldey, and Sandhas, who followed a rather different approach.