Elastic and inelastic neutron scattering fromAl27at 11, 14, and 17 MeV

Fast neutron scattering cross sections have been measured for ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$ using a neutron time-of-flight facility. Angular distributions were measured at angles from 20° to 160° in 5° increments, at incident neutron energies of 11, 14, and 17 MeV. Data are presented for elastic scattering and for inelastic scattering to the sum of the 0.84 and 1.01 MeV states, the 2.21 MeV state, and the sum of the 2.73, 2.98, and 3.00 MeV states. After correcting for compound nucleus effects, the elastic scattering cross sections are well reproduced by the spherical optical model using a linear energy dependence in the real well depth. The inelastic data are interpreted with a coupled channels calculation and the excited core model.