HIGH-RESOLUTION STUDY OF THE REACTIONS FE-54,FE-56,FE-58(O-16,C-12)NI-58,NI-60,NI-62 AND A COMPARISON WITH (LI-6,D) ALPHA-TRANSFER SPECTROSCOPY

Spectra and angular distributions for the reactions 54, 56, 58Fe(16O, 12C)58, 60, 62Ni (Ex = 0.0-4.5 MeV) have been measured at 50 MeV with an energy resolution of 45-80 keV using a Q3D spectrograph. The selectivity of the (16O, 12C) reaction is found to be very similar to the (6Li, d) reaction. The close correspondence recently noted between the (6Li, d) spectra and levels strongly excited in (t, p) and (3He, n) two-nucleon transfer reactions is also observed to be present for the (16O, 12C) reaction. Relative α spectroscopic factors for (16O, 12C) and (6Li, d) obtained in a DWBA analysis assuming direct one-step α-cluster transfer are in very good quantitative agreement. Unnatural parity states, whose excitation is forbidden in the DWBA α-cluster approximation, are observed to be very weakly populated. These results, together with previous work on s-d shell and Ni targets, strongly suggest that the spectroscopic information provided by the (16O, 12C) and (6Li, d) reactions is essentially the same and that this information may be reliably extracted by DWBA analysis. © 1979.