Abstract
The 7.6-h isotope was produced from a 2.5-μg/ target of by the (t,p) reaction. The reaction products were separated radiochemically, and the decay properties of were determined via β-γ, γ-γ, and β-fission correlation techniques. From these measurements we were able to assign 57 γ rays to 26 levels in the daughter . An isomeric level was observed at 1425 keV and assigned a spin and parity of . This level has a of (70±5) ns and we observed two β-delayed fissions with delay times in the proper time range to be associated with fission from this level. This gives a β-delayed fission probability of 2× for this level and a partial fission half-life of ms at the 95% confidence level.
- Received 15 November 1988
DOI:https://doi.org/10.1103/PhysRevC.39.1866
©1989 American Physical Society