Abstract: A radioactively pure iridium fraction was sepsrated from the spallation products of a sample of gold (0.5 g) taat had been irradiated with 660-Mev protons for 0.5 to 1 hours in a cyclotron. Then, at various intervals of time (the time of accumulation of the daughter osmium activities was varied from 1.5 to 4.0 hrs), the osmium daughter activity was separated systematically from the iridium activity by distilling OsO/sub 4/ from a perchloric acid solution. The decay of the osmium activity was followed on an end-window counter. A half-life of 1 plus or minus 0.1 hr was assigned to Os/sup 1//sup 8//sup 3/ because of the variation in the amount of Os/sup 1//sup 8//sup 3/ observed as a function of the time of separation of the osmium fraction. (TTT)
Publication Year: 1961
Publication Date: 1961-03-21
Language: en
Type: article
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