Nanosecond isomers in 186W

Abstract
The levels of 186W fed in the β-decay of 186Ta and EC decay of 186Re were investigated. The single spectrum and the delayed coincidence spectra were measured. The half-lives of three isomers in 186W were determined : [FORMULA] and the upper limit of the 1463 keV level half-life T1/2 ≤ 0.1 ns was estimated. Two-quasiparticle excitations were calculated and their assignment to experimentally observed states is proposed