Neutron spectrometer for improved SNM search.
With the exception of large laboratory devices with very low sensitivities, a neutron spectrometer have not been built for fission neutrons such as those emitted by special nuclear materials (SNM). The goal of this work was to use a technique known as Capture Gated Neutron Spectrometry to develop a solid-state device with this functionality. This required modifications to trans-stilbene, a known solid-state scintillator. To provide a neutron capture signal we added lithium to this material. This unique triggering signal allowed identification of neutrons that lose all of their energy in the detector, eliminating uncertainties that arise due to partial energy depositions. We successfully implemented a capture gated neutron spectrometer and were able to distinguish an SNM like fission spectrum from a spectrum stemming from a benign neutron source.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 908879
- Report Number(s):
- SAND2007-1570
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
FISSION
FISSION NEUTRONS
LITHIUM
MODIFICATIONS
NEUTRON REACTIONS
NEUTRON SOURCES
NEUTRON SPECTROMETERS
NEUTRON SPECTROSCOPY
NEUTRONS
Nuclear reactors-Materials.
Nuclear materials-Monitoring.
Nuclear power plants-Materials.