Abstract
The yield at 90 degrees, and 32 angular distributions of the 4.43-Mev gamma ray from the first-excited state of have been measured for proton bombarding energies between 5 and 12 Mev. The excitation curve for inelastic scattering is characterized by a number of strong resonances, some of which were previously known. In addition, underlying the resonances, there is a monotonically rising background. The angular distributions were fitted by least squares to the expression . Those obtained in the region of the resonances at Mev and Mev can be interpreted by taking into account these two resonances with respective characters and plus one additional state at an excitation energy of 6.38 Mev () in the compound nucleus which can be seen only in elastic scattering. A simple direct-reaction model using a nucleon-nucleon interaction accounts very well for four angular distributions at higher energies in regions showing no resonant structure.
- Received 7 August 1961
DOI:https://doi.org/10.1103/PhysRev.124.1899
©1961 American Physical Society