Abstract
The electron-capture decay of (9 min) has been studied by means of and multiscaled singles and coincidence measurements with Ge(Li) and Si(Li) detector systems. The samples were produced by reactions and on-line isotope separation. About 50 -ray transitions have been assigned to the decay, ∼35 of which have been placed in a proposed level scheme for . The energy of the → isomeric transition has been deduced to be 12.1 keV, and the half-life of the isomer has been measured to be 150±10 ns. From these data, the value of this isomeric transition is found to be 3.7 Weisskopf units. The ground state is assigned an value of , which eliminates the need for some low-energy levels in and that were tentatively proposed in recent data evaluations, where a assignment was made.
RADIOACTIVITY from ; measured , , ICC, , isomeric lifetime in ; deduced levels, , ; ground state deduced , ; Ge(Li) and Si(Li) detectors; on-line isotope-separated sources.
- Received 15 November 1982
DOI:https://doi.org/10.1103/PhysRevC.27.2248
©1983 American Physical Society