A MULTIPLE DETECTOR APPROACH TO RADIOLOGICAL HOT CELL NUCLEAR AND CHEMICAL REMOTE MEASUREMENTS

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% full-wid th-at-half-maximum at 662 keV has been obtained remotely using risetim e compensation and limited pulse shape discrimination (PSD). Isotopic measurement of high-energy beta emitters was accomplished with a rugge dly made, deeply depleted, surface barrier silicon detector. The prima ry function of the remote nuclear screening system is to provide fast qualitative and quantitative isotopic assessment of high-level radioac tive material.