Abstract

The new neutron-rich isotope 186Hf has been produced through a multinucleon transfer reaction by irradiation of natural tungsten targets with 60 MeV/u 18O projectiles. The 186Hf activities were separated radiochemically from the tungsten and reaction product mixture. The γ-ray singles spectra were measured with a high resolution HPGe detector. The new isotope 186Hf was identified based on the growth and decay of 737.5 keV γ rays from the β- decay of its daughter 186Ta. Its half-life has been determined to be 2.6 ± 1.2 min.

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