Abstract
is shown to have a half-life of 12.5±1 milliseconds, and a positron upper limit of 16.6±0.2 Mev. It is produced by the reaction , and has a threshold proton energy of 20.0 Mev. This indicates that is within about 200 kev of being unstable against proton emission. The mass of is 12.0228±0.00015, and the beta-transition is allowed.
- Received 14 February 1949
DOI:https://doi.org/10.1103/PhysRev.75.1815
©1949 American Physical Society