C-12-12 AND O-16+BE-8 DECAY OF MG-24 STATES EXCITED IN THE C-12(O-16,MG-24)ALPHA REACTION(C)

The population and decay of excited states in Mg-24 has been investiga ted through the C-12(O-16,(CC)-C-12-C-12)alpha and C-12(O-16,(BeO)-Be- 8-O-16)alpha reactions, at beam energies of 75, 85, and 115 MeV. The f ragments from the breakup of the Mg-24 nucleus were detected in coinci dence, permitting a study of both the excitation energies and the spin s of the fissioning states. These measurements indicate a series of st ates in Mg-24 between 20 and 40 MeV with spins ranging from J=4 to 14 (h) over bar. The results are discussed in the context of the C-12+C-1 2 quasimolecular scattering resonances and other Mg-24 breakup reactio ns.