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Polonium-209: a new source of analytical tracer

P.E. Figgins, V.R. Casella, C.T. Bishop, A.A. Glosby

Abstract

Polonium-208, currently used as a tracer for polonium-210 determinations, is scarce and expensive. The nuclear properties indicate polonium-209 would have advantages as a tracer. A small amount of polonium-209 is formed during the neutron irradiation of bismuth-209 to form polonium-210. Short-lived polonium-210 decays out leaving polonium-209. Ten-year-old polonium foils were examined by GeLi counting and showed a definite spectrum of polonium-209. Alpha pulse height analysis of one sample showed polonium-209 to be 99% of the total count. This tracer was tested in the analysis of environmental samples.

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Key concepts: Polonium, Radiochemistry, Chemistry