Abstract
Magnetic spectrometer studies were made on the beta spectra of , , , , and . The highest energy beta group of each of these transitions has an abnormally long comparative half-life and probably is a once forbidden decay from a 3- initial state to a 2+ final state. For all, the highest energy beta spectrum was found to have a nonstatistical, nonunique shape. On the assumption that the matrix element dominates the decay, the experimental shape factors were fitted empirically by . The best fits were obtained for values of equal to 15, 10, 5, 20, and 15 for , , , , and , respectively.
- Received 4 April 1960
DOI:https://doi.org/10.1103/PhysRev.119.1308
©1960 American Physical Society