COMPARATIVE EXPERIMENTAL-STUDY OF THE MIRROR N-13-12 AND C-13+C-12 ELASTIC SCATTERINGS(C)

The N-13+C-12 and C-13+C-12 elastic cross sections are measured at the center-of-mass energies of 7.8, 9.6, and 14.2 MeV, using radioactive N-13 and stable C-13 beams and position-sensitive solid-state detector s. These data are analyzed with the optical model assuming the same re al central part of the nuclear potential for both systems as suggested by charge symmetry. The N-13+C-12 angular distributions display a sig nificant backward rise which arises from a parity dependence of the nu cleus-nucleus interaction, as for the mirror C-13+C-12 system. The cor responding parity terms in both potentials are similar when the differ ent charges of the exchanged nucleons and their different binding ener gies are properly taken into account. A smaller imaginary part is obta ined for N-13+C-12 than for C-13+C-12, which might be due to a smaller number of open-two-body inelastic and direct reaction channels.