Article révisé par les pairs
Résumé : The N13 + C12 and C13 + C12 elastic cross sections are measured at the center-of-mass energies of 7.8, 9.6, and 14.2 MeV, using radioactive N13 and stable C13 beams and position-sensitive solid-state detectors. These data are analyzed with the optical model assuming the same real central part of the nuclear potential for both systems as suggested by charge symmetry. The N13 + C12 angular distributions display a significant backward rise which arises from a parity dependence of the nucleus-nucleus interaction, as for the mirror C13 + C12 system. The corresponding parity terms in both potentials are similar when the different charges of the exchanged nucleons and their different binding energies are properly taken into account. A smaller imaginary part is obtained for N13 + C12 than for C13 + C12, which might be due to a smaller number of open two-body inelastic and direct reaction channels. © 1995 The American Physical Society.

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