Two-step processes in the 16O(d,p) 17O reaction

Differential cross sections and vector-analyzing power were measured at incident deuteron energies of 15 MeV and 17 MeV for the 16O(d,d)16O, 16O(d,d')16O(3-) and 16O(d,p)17O reactions and at 16 MeV for the 18O(d,d)18O, 18O(d,d')18O(2+) and 18O(d,p0)19O reactions. The data are compared to the predictions of the DWBA and CCBA theories. The spectroscopic factors of With's shell-model calculations were used in the CCBA calculations. The fits to the data for the 16O(d,p)17O reaction indicate that the first (1/2+) and the fifth (3/2+) excited states are formed exclusively by one-step transfer, the ground state (5/2+), fourth (3/2-+ and eighth (7/2-) excited states are produced mainly by one-step processes and the second (1/2-) and third (5/2-) excited states require both one- and two-step processes. The ground state of 19O(5/2+) is formed mainly by a one-step transfer with a small contribution from the two-step process. The magnitude of the previously determined spectroscopic factors for the two-step transfer appears to have been overestimated