Gamma Rays from Excited Levels inAl25

Abstract

To measure the energy of $\gamma$ rays following resonances in the ${\mathrm{Mg}}^{24}(p, \gamma ){\mathrm{Al}}^{25}$ reaction, thin targets of natural magnesium have been bombarded with protons. The radiation of the resonances at 222, 418, and 825 kev proton energy have been investigated, and the $\gamma$-ray spectra have been observed with a single NaI(Tl) crystal scintillation counter and a Hutchinson and Scarrott pulse height analyzer. Several $\gamma$ rays are identified in the spectra, corresponding to transitions from excited levels in ${\mathrm{Al}}^{25}$ at 3.08±0.03, 2.69±0.02, 2.50±0.06, 1.80±0.02, 0.95±0.08, and 0.45±0.06 Mev energy.