Studies of high-K isomers at TRIUMF-ISAC

The properties of high-K isomers have been investigated by measuring γ rays from a source of the 31-year 178Hfm2 isomer and from the decay of implanted 178, 179Lu beams. Low-intensity transitions have been identified in the decay of 178Hfm2, demonstrating a consistent extension of K-hindrance systematics to higher multipolarities, and elucidating the spin-dependence of the mixing between the two Kπ = 8− bands. A search is underway for new isomers in 178, 179Lu and the preliminary results of the analysis are reported.