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Transuranic Optimized Measurement System (TOMS)

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Tech ID: 2363
Project Overview
This project supports the final demonstration of the Transuranic Optimized Measurement System (TOMS), which was developed to measure low levels of 238Pu in wastes. The TOMS incorporates an innovative detector, the Duode, for lowering the background to improve the minimum detectable activity.

Technology Description
 The Duode detector is a single high-purity germanium detector which has been segmented to provide the functions of a planar and a coax detector in one crystal. Associated timing electronics allow photons which interact only in the front section of the crystal to be histogrammed separately from photons which interact elsewhere in the detector volume. The result is two spectra; the first is effectively from the front 'planar' segment only, and the second is from the entire crystal (including the planar segment). This arrangement provides the maximum sensitivity (highest signal-to-noise ratio) for the measurement of the low energy gamma rays emitted by 238Pu and other plutonium isotopes.

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