Elastic and Inelastic Scattering of Protons from Carbon Nucleus from 6.5 to 16 Mev

Angular distributions and excitation functions of C 12 ( p , p ) C 12 ( Q =0) and C 12 ( p , p ') C 12* ( Q =-4.43 Mev) reactions were investigated with the bombarding energy from 6.5 to 16 Mev and from 9.5 to 16 Mev, respectively, by the INS variable energy cyclotron. Though the angular distributions were found to vary gradually with energy, several distinct anomalies were observed. Especially, at T p =9.1 Mev, very sharp anomaly was found for the elastic scattering. Around T p =10.5 Mev, large anomaly of composite nature was found (which had been reported by Braid and Yntema), where the angular distributions of the elastic and inelastic scattering varied violently. Rather strong correlations were observed between the elastic and inelastic ( Q =-4.43 Mev) scattering. Observed anomalies were found to be closely related to the levels of the compound nucleus N 13 .