Abstract
The -ray spectra of and have been investigated with a NaI scintillation spectrometer. A value of 2.30±0.03 Mev was found for the nuclear ray. has two rays with energies 723±15 and 1033±30 kev; the number of quanta per disintegration are 0.99±0.08 and 1.65±0.20×, respectively. The 1033-kev ray is associated with a weak positron transition to the 1.74-Mev level in . There are less than transitions per disintegration to the 2.15-Mev level of . By combining our results with those of heavy particle reactions and using the predictions of the charge multiplet theory on the energies of the analog states, we conclude that the decay and the weak branch to the 1.74-Mev level of are allowed favored 0→0 (no) transitions. From the data we find that the ratio of the Fermi to the Gamow-Teller interactions constants () is , if one assumes coupling, and for coupling.
- Received 17 April 1953
DOI:https://doi.org/10.1103/PhysRev.91.909
©1953 American Physical Society