Direct reaction mechanism in the ¹¹B(p, α) reaction

Abstract

Absolute differential cross sections for the ¹¹B(p, α) reaction leading to the ground state of ⁸Be have been measured at E_p = 12, 20, 24 and 30 MeV. These results and previous results at E_p = 26.7 and 38 MeV have been compared with PWBA calculations taking into account direct mechanisms and their interference term. Two possibilities have been investigated: firstly, pick-up and heavy-particle pick-up, secondly, knock-out and heavy-particle pick-up. Both possibilities agree well with experimental results.