Abstract
The spontaneous emission of from , recently discovered by Rose and Jones, has been confirmed, and the mass of the emitted particles unambiguously identified. The present measurement was performed with a source containing 9.2 mCi of . An Enge split-pole magnetic spectrograph was used to suppress the intense alpha radiation and to identify the particles. The spectrograph was calibrated with tandem-accelerated beams of , , and . In six days of decay counting, twenty-four events were observed yielding a branching ratio of (4.7±1.3)× for the emission of from relative to that of alpha particles. The value is in fair agreement with the result of Rose and Jones, (8.5±2.5)×, and with more recent measurements from other laboratories.
- Received 20 February 1985
DOI:https://doi.org/10.1103/PhysRevC.32.2036
©1985 American Physical Society