Quantification of 242Pu with a Microcalorimeter Gamma Spectrometer

Authors :: Mercer, David J.
Winkler, Ryan
Koehler, Katrina E.
Becker, Daniel T.
Bennett, Douglas A.
Carpenter, Matthew H.
Croce, Mark P.
de Castro, Krystal I.
Feissle, Eric A.
Fowler, Joseph W.
Gard, Johnathon D.
Mates, John A. B.
McNeel, Daniel G.
Ortiz, Nathan J.
Schmidt, Daniel
Schreiber, Katherine A.
Swetz, Daniel S.
Ullom, Joel N.
Vale, Leila R.
Weidenbenner, Sophie L.
Wessels, Abigail L.
Publication Year :: 2022
Abstract: 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.<br />Comment: 6 pages, 7 figures