Abstract
The reaction has been investigated at an incident energy of 20 MeV. Complete angular distributions were measured in the angular range using a multiangle spectrograph. Known states are populated about twice as strongly as the core-excited four-particle—one-hole (4p-1h) states. Angular distributions for members of the ground-state band show only a moderate forward-angle rise, and those of the negative-parity band and other weak states are approximately symmetric around 90°. Results have been analyzed in terms of Hauser-Feshbach compound-nucleus calculations and finite-range distorted-wave Born approximation calculations in which the three transferred nucleons enter the and/or shells. The contribution of the compound-nucleus cross section has been estimated. The data for the and bands in could be well fitted by an incoherent sum of direct and compound reaction cross sections. Simple analysis of the integrated cross sections based on a () rule is consistent with results of the Hauser-Feshbach calculations. Comparison between the present experimental results and previous triton cluster transfer reactions on emphasizes the enhanced compound/direct ratio for the 4p-1h and other weak states in the present data.
- Received 18 June 1984
DOI:https://doi.org/10.1103/PhysRevC.30.1924
©1984 American Physical Society