(n, t) and (n, α) reactions on 9Be

Abstract

A metallic 9Be target was bombarded with 13.99 MeV neutrons; α-particles, tritons and 6He recoil nuclei were detected and identified with a telescope consisting of two proportional counters and a solid state detector. Absolute differential cross sections were measured for the (n, t) reactions leading to the ground state and first excited state of 7Li and for the (n, α) reactions leading to the ground state and first excited state of 6He. No evidence for higher excited states in 6He has been found. An attempt has been made to interpret the observed (n, α) angular distributions in terms of the direct reaction model.