Core excitations in (d,p) reactions including transitions to continuum levels

Abstract

Effects of core excitations in (d, p) reactions are investigated for 12C(d, p) 13C ∗ reactions in the CCBA framework, where couplings of channels are considered for the ground and first-excited levels of 12C in the initial state and for the bound 1 2 + and 5 2 + levels and low-lying continuum levels of 13C in the final state, where a discretization is introduced for the continuum region. In the transitions to the continuum levels, matrix elements are calculated by the use of scattering-state wave functions for the final neutron. Theoretical cross sections and vector analyzing powers are compared with experimental data, where significant contributions of core-excitation processes are identified, particularly in the transition to the 5 2 + II level of 13C. Spectra of emitted protons are calculated and compared with the measured ones. Adequate agreement between theory and experiment is found throughout the present investigation.