Microscopic form factor for DWBA analysis of light-ion induced three-nucleon transfer reactions

Abstract

A modified zero-range distorted-wave Born approximation calculation was performed for the (p, α) reactions. The form factor is calculated by a first method, which is an extension of the Bayman and Kallio method to extract the relative l = 0 part of two-nucleon shell-model wave functions. The method includes some of the range effects so that one can predict the absolute magnitudes of the cross sections. A second method in finite range involves the 3He cluster expansion of the α-particle where the known ( 3He, α) transfer normalization may be used to estimate the absolute cross sections. The 118Sn(p, α) 115In reactions are analyzed using the hole-vibration coupling model for 115In. The shapes of the experimental cross sections and the analyzing powers can be fitted by the calculations but the magnitudes of the cross sections are predicted to be too small.