High spin resonances in C-12 plus C-12 scattering

We report on new experimental data which reveal high spin resonances in C-1 2 +C-12 scattering. We have measured excitation functions for the C-12 [C-1 2, C-12(3(1)(-)) + C-12(3(1)(-))] reaction over the centre of mass energy r ange E-c.m.= 31 to 45 MeV. Resonances have been observed at E-c.m.= 32.5, 3 7.5 and 43 MeV. Detailed angular correlation measurements have been perform ed at the energy corresponding to the peak of each resonance. From an analy sis of the angular correlations we suggest a dominant angular momentum of J = 22 at the highest energy. We interpret the results in terms of an alpha cluster model of superdeformed states in Mg-24. (C) 1998 Elsevier Science B .V. All rights reserved.