Anomaly in the normalization constant of the (3He, p) reaction

The normalization constant has been calculated for the Ni-62(He-3, p)Cu-64 reaction leading to the ground-state analogue (0(+); 4) at E-x = 6.82 MeV and the excited-state analogue (2(+); 4) at E-x = 8.19 MeV in Cu-64, from a comparison of the angular distribution of cross-section data with DWBA predictions. The normalization constants extracted from the data for these two analogue states are found to vary by an order of magnitude. One reason for this variation may be the influence of processes other than the simple one-step mechanism. CCBA calculations for the core excitation of Ni-62, and CRC calculations for sequential transfer via the (He-3-d-p) path have been carried out for the reaction leading to the 6.82 MeV(0(+); 4) state in order to investigate the importance of alternative reaction mechanisms and to justify the reliability of the deduced normalization constant for the ground-state analogue transition.