Abstract
The spectra and transitions in the decay of , , , and , produced by the () reaction in the UCLA sector-focused cyclotron, have been measured with a wedge-gap magnetic spectrometer and a 3- lithium-drifted germanium detector. An on-line SDS-925 computer was used to separate, by half-life analysis, the activity of interest from longer-lived contaminants. The half-lives were measured to an accuracy of 0.5% and decay schemes are proposed. The ground-state masses are determined to 25-40 keV. In all cases, observation of a superallowed transition unambiguously determines the , analog state. The excitation energies of these analog states are measured to an accuracy of 3 keV. Mass relationships are used to predict from these data the excitation energy of the first , analog states.
- Received 17 April 1967
DOI:https://doi.org/10.1103/PhysRev.165.1194
©1968 American Physical Society