Special Nuclear Material Characterization Using Digital 3-D Position Sensitive CdZnTe Detectors and High Purity Germanium Spectrometers

Streicher, Michael; Brown, Steven; Zhu, Yuefeng; Goodman, David; He, Zhong

doi:10.1109/TNS.2016.2593631

Special Nuclear Material Characterization Using Digital 3-D Position Sensitive CdZnTe Detectors and High Purity Germanium Spectrometers

Journal Article · Sat Oct 01 04:00:00 EDT 2016 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/TNS.2016.2593631· OSTI ID:1487285

Streicher, Michael ^[1]; Brown, Steven; Zhu, Yuefeng; Goodman, David; He, Zhong

University of Michigan

Special nuclear material (SNM) monitoring often requires high resolution gamma-ray spectroscopy for material characterization. Portable systems and rapid deployment are also highly valued for some applications. Deployable gamma-ray imaging spectrometers using pixelated CdZnTe semiconductor detectors have become commercially available within the past three years to meet these requirements. CdZnTe systems have demonstrated room-temperature energy resolutions below 0.5% FWHM at 662 keV using single pixel events and below 0.7% FWHM at 662 keV using all events. The systems are able to go from storage to measurement in less than two minutes. Special nuclear materials were measured at the Y-12 National Security Complex and at the Device Assembly Facility at the Nevada National Security Site. The use of a CdZnTe system to measure uranium enrichment was demonstrated and uranium spectral features were compared to a commercially available high purity germanium (HPGe) spectrometer. The use of passive gamma ray spectroscopy techniques to estimate plutonium grade using CdZnTe detectors was demonstrated for the first time.

Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)

DOE Contract Number:: NA0002131

OSTI ID:: 1487285

Journal Information:: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 5 Vol. 63; ISSN 0018-9499

Publisher:: IEEE

Country of Publication:: United States

Language:: English

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