Article ID Journal Published Year Pages File Type
1832220 Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2007 6 Pages PDF
Abstract

A re-determination of the half-life of the α-decay nuclide 243Am is reported using the relative activity method. Different synthetic mixtures were prepared by mixing solutions of isotopically pure 241Am and enriched 243Am isotopes, with 241Am/243Am α activity ratios in the range of 0.2–2. The 241Am/243Am atom ratios in these mixtures were determined by thermal ionization mass spectrometry and the α activity ratios were obtained by α spectrometry. A value of 17.022±0.027 was obtained for the half-life ratio of 243Am to that of 241Am. Using a value of 432.2±(0.15%) a for the 241Am half-life, a value of 7357±23 a (1σ) was obtained for the half-life of 243Am. This is the value with highest precision and accuracy reported so far.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Instrumentation
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