Ch. Dasso et al., DYNAMIC EFFECTIVE POTENTIAL FOR ALPHA-PARTICLE BOUND AND QUASI-BOUND STATES, Physical review. C. Nuclear physics, 54(3), 1996, pp. 1217-1220
We exploit analytic properties of the optical potential for elastic sc
attering of alpha particles on nuclei to extract information on the ef
fective interaction that should be used to describe the motion of a cl
uster of two neutrons and two protons bound to a nuclear system. This
prescription solves long-standing ambiguities in the formalisms used f
or the study of a decay.