Abstract
When is bombarded with 28-Mev protons the dominant reaction is elastic scattering, exhibiting a strong peak in the forward direction and a slight rise in the backward direction. The dominant inelastic reaction is the inverse Butler or pickup deuteron process.
The two remaining inelastic reactions observed, and , have cross sections of 8.9±1.0 and 4.8±1.3 mb, respectively. These are an order of magnitude or more smaller than the cross sections of the dominant processes.
Of the remaining possible reactions—(), (), ()—only the last was energetically possible at the beam energy used. It was not observed. This indicates a lack of evidence for an excited level that decays principally by -ray emission; it also indicates that the inverse photodisintegration process, suggested by Flowers and Mandl, has too small a cross section to contribute in this energy region.
The rest-frame momentum spectrum of protons from the reaction shows no evidence of an excited level in in the energy region explored.
- Received 25 March 1957
DOI:https://doi.org/10.1103/PhysRev.107.1050
©1957 American Physical Society