Abstract
A thick target was bombarded with 72.2-MeV ions accelerated in the Oak Ridge isochronous cyclotron. Reaction products were detected at the focal plane of an Elbek spectrograph using a 60-cm long position-sensitive proportional counter. In addition to determining the position of the detected particle along the focal plane, the energy loss in the counter helped to identify the particle type. Angular distributions were measured for all four possible single-nucleon transfer reaction products, i.e., , , , and . These reactions were found to excite single-particle or single-hole states in the heavy residual nuclei, though some groups corresponding to the light ions being left in excited states were also identified. A finite-range distorted-wave Born-approximation analysis including exactly the effects due to recoil was made of these differential cross sections with particular attention being paid to various uncertainties. The major uncertainties arise from the choice of potentials (especially in the exit channels) and of form factors for the bound nucleon before and after transfer. Except for the (, ) reactions, which suffer from an unfavorable matching between incoming and outgoing orbits, the predicted angular distributions were in good agreement with the data, with extracted spectroscopic factors close to expected values and to those obtained in other light- and heavy-ion experiments. The indication then is that these reactions are predominantly one-step processes, though there is some evidence of the need for other effects to be considered.
NUCLEAR REACTIONS (, ), (, ), (, ), (, ), MeV; measured ; optical model and DWBA analyses; deduced spectroscopic factors. Enriched target.
- Received 10 April 1974
DOI:https://doi.org/10.1103/PhysRevC.10.1429
©1974 American Physical Society
