A.V. Goodsell, W.S. Charlton. ,
"Bent-Crystal Spectrometer Analyzing Plutonium K X-Rays for Applications in Nuclear Forensics,"
Proceedings of the INMM 52nd Annual Meeting
, Palm Desert, CA, July 17-21, 2011.
The ability to quickly quantify the Pu content within used
nuclear fuel is essential to nuclear forensics. Analysis of the Pu
to U ratio can provide information on fuel and reactor history,
including age, burnup and reactor type. Plutonium concentration
data can be acquired through non-destructive analysis (NDA) by
detecting self-induced x-ray fluorescence (XRF) from Pu in the
fuel. However, during conventional spectroscopy, the characteristic
Pu x-ray peak of interest lies beneath background and requires an
extended exposure time. Bent-crystal spectrometers allow x-rays of
selected energies, obeying Bragg's law for coherent scattering of
incident photons, to be focused directly onto a detector, thus
providing a high signal with limited background by decreasing the
possible Compton interaction in the detector. Determining a useable
crystal and experimental geometry that allows for the study of high
energy x-rays requires additional attention. While previous
experiments investigating wavelength dispersive bent-crystals have
been performed, they were primarily concerned with lower x-ray
energies (< 60 keV). The fluorescent x-rays of interest are from
the plutonium K-series, ranging from 99.55 to 120.70 keV.
Associated Project(s):Bent-Crystal Spectrometer Analyzing Plutonium K X-Rays for Applications in Nuclear Forensics