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arxiv 2202.02933 v2 pith:JIPJMZGW submitted 2022-02-07 physics.ins-det nucl-ex

Quantification of 242Pu with a Microcalorimeter Gamma Spectrometer

David J. Mercer , Ryan Winkler , Katrina E. Koehler , Daniel T. Becker , Douglas A. Bennett , Matthew H. Carpenter , Mark P. Croce , Krystal I. de Castro
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Eric A. Feissle Joseph W. Fowler Johnathon D. Gard John A. B. Mates Daniel G. McNeel Nathan J. Ortiz Daniel Schmidt Katherine A. Schreiber Daniel S. Swetz Joel N. Ullom Leila R. Vale Sophie L. Weidenbenner Abigail L. Wessels
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classification physics.ins-det nucl-ex
keywords gammacampaignfirstmeasurementmicrocalorimeterreportspectrometeraccountancy
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We report measurements of the 103-keV and 159-keV gamma ray signatures of 242Pu using microcalorimetry. This is the first observation of these gamma rays in a non-destructive measurement of an unprepared sample, and so represents an important advance in nuclear material accountancy. The measurement campaign also serves as the first demonstration of a field campaign with a portable microcalorimeter gamma-ray spectrometer. For the 103-keV gamma ray we report an improved centroid energy and emission probability.

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