SPINS AND PARTIAL WIDTHS OF QUASIMOLECULAR RESONANCES IN C$sup 12$ + C$sup 12$ INTERACTIONS

Angular distributions for the reaction C/sup 12/(C/sup 12/, alpha )Ne/ sup 20/ to levels in Ne/sup 20/ at 0, 1.63. 4.25, and 4.97 Mev and an unresolved doublet at 5.63-5.80 Mev were studied at incident energies near 6 Mev in the center-of-mass system. The results strongly suggest spins 2 and 4 for the quasimolecular states at 19.5 and 19.9-Mev excitation in Mg/sup 24/. The partial widths of these states reduced to units of h/sup 2//MR/sup 2/ appropriate to each channel are given; in these units the C/sup 12/ width is more than ten times the average width for alpha particle emission and one hundred times the average nucleon width. The nature of these states, which are prominent in the total reaction cross section, is discussed. (auth)