Abstract
The electromagnetic decays of the states between 5 and 6.5 MeV were studied using the reaction. From investigations of the gamma-ray spectra on and off the 3.0-MeV resonance for production of the 6.44-MeV level, this state was found to decay to the ground, 3.95-, and 5.10-MeV levels of with branching ratios of (65±3%), (21±2)%, (14±3)%, respectively. From a study of the internal pairs corresponding to the 6.21 → 2.31 transition, this transition was shown to be predominantly so that the 6.21-MeV level has even parity. Similarly, it was confirmed that the 6.44 → 0 transition is predominantly . The angular distributions of the gamma rays from + at MeV were measured. It was shown that the mixing parameter (amplitude ratio of quadrupole to dipole radiation) for the 5.69 → 0 transition is and for the 5.10 → 0 transition . The branching ratios of the 5.10-, 5.69-, and 6.21-MeV levels to the ground state and 2.31-MeV first excited state were measured. The results are in satisfactory agreement with previous determinations.
- Received 4 December 1963
DOI:https://doi.org/10.1103/PhysRev.134.B338
©1964 American Physical Society