Abstract
The beta-spectrum of measured in a double lens spectrometer on samples containing , , and , exhibits an allowed shape from kev to 14 kev, where instrumental effects distort it. Conversion lines found beyond the end point combined with gamma-scintillation counter measurements lead to the assignment of gammas of 39, 53, 100, 124, and 384 kev associated with the alpha-decay of , and a gamma of 49.6 kev accompanying the alpha-decay of ; and the existence of 26.4- and 59-kev gammas in alpha-decay is confirmed. A conversion line corresponding to a highly converted 41-kev gamma in was found. Gammas of 100 and 145 kev probably associated with the alpha-branch in were also found.
The influence of the orbital electronic rearrangement energy on the beta-decay is discussed.
- Received 24 April 1952
DOI:https://doi.org/10.1103/PhysRev.88.1155
©1952 American Physical Society