Abstract
A large isotopic-spin violation was observed in the reaction. The yield to the second level (3.063 MeV) in was measured and compared with the yield to an adjacent (3.133 MeV) level. The ratio of the yields to these two levels, averaged over angles from 50° to 140°, for an input energy of 4.00 MeV, was found to be 0.40. A value of approximately 1 was found for this ratio using the reaction. The isotopic-spin selection-rule breakdown is attributed to Coulomb mixing of states in the compound nucleus and in the residual nucleus . Angular distributions of 11 proton groups from the reaction and of seven alpha groups from the reaction are presented.
- Received 15 June 1964
DOI:https://doi.org/10.1103/PhysRev.136.B399
©1964 American Physical Society