New measurements and reanalysis of 14N elastic scattering on 10B target

The angular distributions of elastic scattering of(14)N ions on(10)B targets have been measured at incident beam energies of 21.0 and 24.5 MeV. Angular distributions at higher energies 38-94.0 MeV (previously measured) were also included in the analysis. All data were analyzed within the framework of the optical model and the distorted waves Born approximation method. The observed rise in cross sections at large angles was interpreted as a possible contribution of the alpha-cluster exchange mechanism. Spectroscopic amplitudesSA(2)andSA(4)for the configuration(14)N -> B-10 +alpha were extracted. Their average values are 0.58 +/- 0.10 and 0.81 +/- 0.12 forSA(2)andSA(4), respectively, suggesting that the exchange mechanism is a major component of the elastic scattering for this system. The energy dependence of the depths for the real and imaginary potentials was found.