Abstract
The β decay of to levels in has been studied. The nuclides were produced by fragmentation of projectiles having energies of 70 MeV/nucleon in a thick target. β and γ singles, β-γ and γ-γ coincidence data were collected and used to construct the low-energy level scheme of New spin-parity assignments have been deduced for some excited states in based on measured β decay branching ratios and systematics of other isotones. A 195-keV transition was identified in with a half-life of 13.0(2) ms, a value several orders of magnitude shorter than previously reported, and is consistent with an multipolarity. The low-energy level structure of is shown to be consistent with particle-triaxial rotor model calculations employing a ground state quadrupole deformation with
- Received 26 May 1998
DOI:https://doi.org/10.1103/PhysRevC.58.3187
©1998 American Physical Society