Synthesis and Decay of ~(197)Os

By irradiation of platinum with 14 MeV neutrons, ~(197)Os is produced through the reaction (n,2p). The γ rays following the β~- decay of ~(197)Os are investigated with HPGe detectors. The ten new γ rays are observed, and the half-life of ~(197)Os is 2.8±0.6 min. A partial decay scheme of ~(197)Os is proposed based on γ(X)-γ coincidence measurements.