Double-Differential Cross Section of Light Composite Particles in the Exciton Model

Double-differential cross-section formulations are presented of a light composite particle projectile considering pickup-type reactions with one and two particles above the Fermi sea by using energy-averaged and energy-angle correlated kernels, respectively. The calculated results of cross sections, spectra, and double-differential cross sections indicate that generally the contributions of the pickup-type reactions with two particles above the Fermi sea are ∼15 to 25% when the incident energies are <50 MeV and become dominant when the incident energies are >50 MeV in some region of the outgoing energies and angles, whereas the forward tendency of the calculated angular distributions by the pickup configuration with two particles above the Fermi sea is weaker than that by the pickup configuration with one particle above the Fermi sea. The energy-angle correlation must be considered for the reactions of the outgoing composite particle with a higher incident energy.