L-113 HOW DOES THE ELASTIC SCATTERING OF 12C + 20Ne COMPARE WITH THAT OF 16O + 16O?

Résumé.- Les fonctions d’excitation de cinq voies de sortie du système 12C + 20Ne entre 22 et 28 MeV (C.M.) présentent une structure importante à 90 ° et 130 ° (C.M.). Cette structure, analogue à celle qu’on observe pour 16O + 16O est analysée en termes d’accord des moments angulaires. On présente une distribution angulaire à 24,7 MeV (C.M.). Il est montré que l’absorption due aux voies directes est intermédiaire entre celle de 16O + 16O et 18O + 18O. Abstract.- Excitation functions for 5 exit channels of the 12C + 20Ne system are given in the range 22-28 MeV centre of mass incident energy. An important structure is observed in the elastic scattering excitation functions taken at 90 ° and 130 ° (C.M.). This structure, which reminds one of the 16O + 16O case, is studied in terms of angular momentum matching. An angular distribution taken at 24.7 MeV (C.M.) is also presented. The direct channel absorption is shown to be inter-mediate between the 16O + 16O and 18O + 18O cases. Since the observation [1] of a strong gross structure in the 160 + 16 0 elastic scattering functions, many other systems of identical or non identical light nuclei have been studied [2]. It was soon recognize