Optical potential for 12C + 28Si scattering

Abstract

12C + 28Si elastic scattering angular distributions are smooth functions, relatively easily fit by optical potential predictions, at laboratory bombarding energies, E 1 ab , within ≈ 10 MeV of the Coulomb barrier (i.e. up to E 1 ab ≈ 27 MeV). Between E 1 ab = 27 and 36 MeV the angular distributions show pronounced oscillatory structure which is not easily fit with an optical potential. No optical potential has been found to give a very good account of all the angular distributions simultaneously; the best simultaneous fit to all the data was achieved with a surface-transparent potential whose real and imaginary well depths are energy dependent.