Abstract
A three-channel resonating-group calculation is performed to study the effects of channel coupling on the properties of the + system. The channels included are +, n+, and n+* channels, with and * described by harmonic-oscillator functions representing d+ cluster configurations with relative orbital angular momenta equal to 0 and 2, respectively. By comparing with the + single-channel result, it is found that the three-channel calculation improves the ground state energy by 0.68 MeV and yields additional features such as cusps in the phase shifts and a dispersionlike resonance structure in the phase shift. In addition, it is noted that, in states with larger values, the n+* aligned configurations make particularly important contributions. Characteristics of nucleon-exchange terms have also been briefly investigated; here one finds that, as far as the + system is concerned, the important one-exchange and core-exchange contributions are only weakly affected by the presence of other channels.
NUCLEAR REACTIONS , . Effects of channel coupling. Resonating-group method with +, n + , and n + * channels.
- Received 7 June 1983
DOI:https://doi.org/10.1103/PhysRevC.28.1869
©1983 American Physical Society