Scattering of 4·9 MeV Protons By 27Al

Abstract

Since 1934 there have been 24 determinations of the level scheme of 2"7.Al. However, even the more recent findings are far from harmonious and the question naturally arises as to how much of the apparent discord is due to target contamination, inadequate resolution, etc., and how much follows from the use of different nuclear reactions where, presumably, selection rules may operate to control transition probabilities. For instance, four of the more recent reports claimed a doublet at .--1 MeV while the remainder found only a single level.