Abstract
The differential cross sections for the [, (g.s.)](g.s.) reaction have been measured as a function of angle at bombarding energies of 3.30, 5.00, and 5.75 MeV, and as a function of the bombarding energy over the range extending from 2.50 to 5.00 MeV at a laboratory angle of 40°. The reaction exhibits a pronounced resonance at about 5.6 MeV corresponding to an excited state of at an excitation energy of 16.75 MeV. The angular distribution on the resonance suggests an assignment of . The total off-resonance cross section for the reaction is surprisingly large: 0.18 mb at 3.30 MeV and 0.37 mb at 5.00 MeV. The behavior of the off-resonance differential cross section suggests the possibility of direct reaction. The angular distributions at 3.30 and 5.00 MeV have been fitted with a distorted-wave Born-approximation calculation in which a five-nucleon system was assumed to be transferred from to as a point particle. The gross approximations which had to be employed in the calculation do not allow a meaningful spectroscopic factor to be extracted. The reaction, however, plays a significant part in the interaction of with .
- Received 22 March 1968
DOI:https://doi.org/10.1103/PhysRev.172.1015
©1968 American Physical Society