Abstract
The effectiveness of conventional measurement techniques for environmental monitoring is limited by background and other interferences. We are exploring a new measurement approach involving the detection of α particles in coincidence with conversion electrons as a means to simultaneously assay environmental samples for multiple actinides without chemical separation. The initial target isotopes studied in this work are 238Pu, 239Pu, 240Pu and 241Am. We explore various aspects of the design, such as impact of the mounting of the source material, energy resolution requirements and impact of a background on isotopic uncertainties. We conclude that a dual gas-proportional counter and a dual-sided, large-area silicon detector could provide similar performance for the measurement scenario examined.
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