Below are Uranium spectra taken with Amptek XR-100 Detectors. The spectra show the differences between 95% and 97% enriched levels of Uranium-235, natural Uranium Ore, and Depleted Uranium.
Below is a 94% Enriched Plutonium-239 Spectrum taken with an Amptek CZT Detector.
“Use of miniature CdZnTe X/gamma detector in nuclear safegaurds: characterisation of spent nuclear fuel and uranium enrichment determination.”
K.Abbas (a), J. Morel (b), M. Etcheverry (b), G. Nicolaou (a)
(a) European Commission, Joint Research Centre Institute for Transuranium Elements Postfach 2340, D-76125 Karlruhe, Germany
(b) Laboratoire Primaire des Rayonnements Ionisants, CE-Saclay B.P. 52,F-91193 Gif-sur-Yvette Cedex, France
Nuclear Instruments and Methods A 405, p.153-158, 1998.