Evidence for Recoil Effects in Heavy-Ion Transfer Reactions

Data are presented for single-proton transfer reactions induced by ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ ions on ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ at high bombarding energies. Analysis using a no-recoil distorted-wave Born approximation (DWBA) yields spectroscopic factors in marked disagreement with lightion results. Analysis using DWBA theory including first-order recoil corrections indicates that the discrepancies are largely, if not entirely, the result of ignoring recoil effects.