Angular Distributions of the Gamma Rays from the ReactionNa23(p, γ)Mg24

Abstract

Resonances occurring in the compound nucleus ${\mathrm{Mg}}^{24}$ resulting from the proton bombardment of sodium have been studied in the energy range from $E_p=0.58\mathrm{}$ to $E_p=1.50\mathrm{}$ Mev. Ten resonances were found to have a relatively large yield of capture gamma rays. The cascades leading to the ground state of ${\mathrm{Mg}}^{24}$ were determined and found to proceed for the most part through well-known lower lying states. The angular distribution of the first gamma ray emitted in the decay was measured for six of these resonances. The resonance energies in Mev and the corresponding assignments for spin and parity are the following: $E_p=0.595, 0.676, 0.740, 0.744, 0.877\mathrm{}(1+), 0.989(4\mathrm{}\pm ), 1.022\mathrm{}(2-), 1.321\mathrm{}(3+), 1.398, 1.419\mathrm{}(4+)\mathrm{}$.