NDLI: Ultra-high resolution alpha particle spectroscopy using cryogenic microcalorimeters

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Ultra-high resolution alpha particle spectroscopy using cryogenic microcalorimeters

Content Provider	Semantic Scholar
Author	Horansky, Robert D. Ullom, Joel N. Beall, J. B. Doriese, W. Bertrand Duncan, William D. Ferreira, L. Hilton, Gene Charles Irwin, Kent D. Reintsema, Carl D. Vale, Leila R. Rabin, Michael William Hoover, Andrew S. Lamont, Stephen P. Rudy, Clifford R.
Copyright Year	2007
Abstract	Submitted for the MAR07 Meeting of The American Physical Society Ultra-high resolution alpha particle spectroscopy using cryogenic microcalorimeters R. D. HORANSKY, J. N. ULLOM, J. B. BEALL, W. B. DORIESE, W. D. DUNCAN, L. FERREIRA, G. C. HILTON, K. D. IRWIN, C. D. REINTSEMA, L. VALE, National Institute of Standards and Technology, M. W. RABIN, A.S. HOOVER, S. P. LAMONT, C. R. RUDY, Los Alamos National Laboratory — We have built a novel alpha particle detector using a transition edge sensor (TES) thermometer attached to a bulk superconducting absorber and have measured < 2.5 keV resolution at 5.3 MeV . We have used the microcalorimeter to measure a mixture of Pu isotopes and are able to individually resolve peaks corresponding to 239Pu and 240Pu which are separated by 12.9 keV. The 240Pu/239Pu activity ratio is a key parameter for determining whether a plutonium sample is weapons or reactor grade. Conventional silicon based detectors achieve resolutions no better than 10 keV, severely limiting current actinide assays. In addition, the microcalorimeter alpha detector has shown significantly better resolution for gamma rays. The origin of the resolution difference for gamma and alpha interactions may be due to lattice damage and is currently under study. Robert Horansky National Institute of Standards and Technology Date submitted: 02 Dec 2006 Electronic form version 1.4
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://absimage.aps.org/image/MAR07/MWS_MAR07-2006-006326.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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