Spins and Parities of Levels of 9Be Below 15 MeV

Abstract

In a recent study of the cross section of the reaction 9Be(y,n) (Thies, Spicer, and Baglin 1959), distinct maxima were observed at 11·25 and 13 ·25 MeV. The maximum at 11·25 MeV was identified with the known level at 11·3 MeV and the 13 ·25 MeV maximum was attributed to absorption by one level at that energy. The nearly equal widths of the 11·25 and 13 ·25 MeV peaks justify this assumption. These peaks were attributed to M1 or E1 absorption by Thies, Spicer, and Baglin (1959).