Evidence for one-pion charge exchange in N-13+C-13 elastic scattering near the Coulomb barrier
(1996) Physical Review C (Nuclear Physics) — Vol. 54, n° 5, p. 2477-2484 (1996)
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- Abstract
- Elastic N-13 + C-13 cross sections are measured at center-of-mass energies of 8.15, 10.0, and 14.75 MeV, using a radioactive N-13 beam and position-sensitive solid-state detectors. The N-13 + C-13 angular distributions display oscillations beyond 80 degrees and even a significant rise at large angles for the two higher energies. These data are analyzed in the framework of the optical model including a parity-dependent term necessary to explain the backward behavior. This parity term is among the strongest encountered in heavy-ion collisions. Its properties are close to those of the parity term reproducing the N-13 + C-12 elastic scattering in the same energy range. Its long-range nature indicates that the parity dependence arises from a single rather than from a double exchange. One-pion charge exchange between the valence nucleons seems to possess the necessary properties as qualitatively shown by a simple molecular model.
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Lienard, E., Baye, D., Delbar, T., Descouvemont, P., Duhamel, P., Galster, W., Kurokawa, M., Leleux, P., Licot, I., Lipnik, P., Michotte, C., Motobayashi, T., Ninane, A., Sparenberg, J., Vanhorenbeeck, J., & Vervier, J. (1996). Evidence for one-pion charge exchange in N-13+C-13 elastic scattering near the Coulomb barrier. Physical Review C (Nuclear Physics), 54(5), 2477-2484. https://doi.org/10.1103/PhysRevC.54.2477 (Original work published 1996)