Low energy elastic scattering fromSi28targets using projectiles with9≤A≤18

A survey of elastic scattering angular distributions from ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ using beams of ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, and ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ has been carried out for energies near the Coulomb barrier. The projectile bombarding energies used were ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$(14, 17 MeV); ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(24, 27, 30 MeV); ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$(27, 30, 33 MeV); ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(33, 36, 38 MeV) and ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$(36 MeV). Optical model analyses using a previously proposed parameter set have been carried out in order to fit the data in a global manner. Although low energy data cannot completely define the optical model potential, it is interesting that the potential of Cramer et al., which they used to describe ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ +${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ scattering in the energy range from 33-215 MeV, yields a reasonable description of all the angular distributions for all projectiles and energies presented here.