Abstract
The short-lived activities , , , , and have been studied by bombarding targets with a mechanically chopped Van de Graaff deuteron beam and by measuring the delayed gamma radiations with a lithium-drifted germanium detector. In the decay of , weak gamma rays of 8315±6 and 9048±4 keV have been observed which correspond to beta-ray branches to the 8312- and 9052-keV states of with values of 4.8±0.3 and 3.7±0.3, respectively. In the known beta decay of to the 1554-keV level of , the energy of this state is found to be 1553.9±1.3 keV, and the measured gamma-ray branching intensities agree with previous results. A weak gamma ray of 3334±8 keV was observed in the beta decay of , corresponding to a beta-ray branch to the 4969-keV state of with . The energy of the first excited state was measured as 1632.6±0.8 keV. The gamma ray emitted in the decay of has an energy of 1777.8±0.6 keV. Upper limits are given for other possible beta-ray branches to known states in the decays of the various activities studied.
- Received 27 April 1966
DOI:https://doi.org/10.1103/PhysRev.149.743
©1966 American Physical Society