Abstract
Measurements were made of the energy spectra at various angles of protons and particles emitted from the reactions of protons with and particles with to determine the extent to which the deexcitation of the reaction intermediate, at 20.2-MeV excitation energy, is independent of its mode of formation. Similarly, the reaction intermediate at 23.6 MeV was formed by protons on and particles on , again to determine to what degree its deexcitation by proton and -particle emission is independent of its mode of formation. Small differences in the shapes of corresponding energy spectra [() versus (), and () versus ()] that were observed in apparent violation of the Bohr-independence hypothesis are removed after account has been taken of the effects of angular-momentum conservation. The observed enhancement of the ratio of cross sections for the proton entrance channel over that for the entrance channel cannot be interpreted in terms of angular-momentum conservation. The consequences of the possibility of isotopic-spin conservation, when considered, lead to enhanced proton reemission similar to that observed experimentally.
- Received 13 March 1969
DOI:https://doi.org/10.1103/PhysRev.187.1449
©1969 American Physical Society