Abstract
The decay of (193 ms) to the low-spin isomer (735 ms) was studied from mass-separated activity produced in thermal neutron fission of . γ singles and γ-γ coincidence measurements resulted in the placement of 67 γ transitions in a decay scheme with 26 levels below 2 Mev. The multipolarities of low-energy transitions were determined from internal conversion electron measurements. Logft values were deduced using an absolute γ-ray intensity determination for the A=100 decay chain. The levels in at 10.70 and 974.61 keV each receive ∼40% of the β feeding from . A rotational band (with , , and levels at 10.70, 76.15, and 172.03 keV) is proposed which can be characterized as a nearly ‘‘pairing-free’’ band. Other levels in are discussed in terms of two-quasiparticle Nilsson orbitals.
- Received 20 April 1987
DOI:https://doi.org/10.1103/PhysRevC.36.1118
©1987 American Physical Society