A multiple detector approach to radiological hot cell nuclear and chemical remote measurements

Abstract

A remote measurement system has been constructed for in-situ gamma and beta isotopic characterization of highly radioactive nuclear material in hostile environments, A small, collimated, planar CdZnTe detector is used for gamma-ray spectroscopy. Spectral resolution of 2 % fullwidth-at-half-maximum at 662 keV has been obtained remotely using risetime compensation and limited pulse shape discrimination (PSD) . Isotopic measurement of highenergy beta emitters was accomplished with a ruggedly made, deeply depleted, surface barrier silicon detector. The primary function of the remote nuclear screening system is to provide fast qualitative and quantitative isotopic assessment of high-level radioactive material.