Excitation of 14C by 45 MeV 11B ions

Abstract

Angular distributions of the 11B + 14C elastic scattering and inelastic scattering for transitions to a few excited states of 14C were measured at E lab( 11B) = 45 MeV over the full angular range. The data were analyzed within the coupled-channels method. Contributions from one- and two-step transfer reactions were found to be negligible. Quadrupole deformation of the 14C ground state was deduced to be negative, the deformation of the 8.318 MeV (2 +) state was found to be similar to that of the ground state. The single particle model calculations reproduced the experimental data for transition to the 6.094 (1 −) state of 14C much better than the collective model analysis. The fit to this experimental data set was improved when we took into account reorientation of 11B in its ground state and considerably enlarged the radius of the potential binding the neutron to the 13C core. The same procedure was tested against the experimental data for transition to the 1/2 + (3.089 MeV) excited state of 13C, populated in the 11B + 13C scattering at E lab( 11B) = 45 MeV, with the similar effect.