Journal ArticleDOI
The thermal neutron response of miniature silicon carbide semiconductor detectors
TLDR
In this paper, the authors performed neutron response calibrations for miniature SiC semiconductor detectors based on a Schottky diode design in neutron fields maintained at the National Institute of Standards and Technology (NIST).Abstract:
Neutron response calibrations have been performed for miniature SiC semiconductor detectors based on a Schottky diode design in neutron fields maintained at the National Institute of Standards and Technology (NIST). The SiC diodes detect neutrons via neutron-induced charged particles (tritons) produced by the 6 Li(n,α) 3 H reaction. The neutron response was calibrated at fluence rates from 1.76×10 4 to 3.59×10 10 cm −2 s −1 in NIST neutron fields. The maximum deviation from linearity of the fit of the neutron response of the SiC detectors to the NIST-measured fluence rates is much less than 5%, which is the estimated uncertainty in the measured fluence rates. A direct comparison of the SiC count rates to count rates obtained with a NIST double fission chamber over limited ranges where the detector positions and configurations remain unchanged shows a relative precision of ±0.6%. In a separate set of calibrations, a SiC neutron detector that had been previously irradiated with a fast ( E >1 MeV) neutron fluence of 1.3×10 16 cm −2 was found to have an absolute neutron fluence rate response that was indistinguishable from that of a previously unirradiated detector.read more
Citations
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Journal ArticleDOI
Silicon carbide and its use as a radiation detector material
TL;DR: In this paper, a comprehensive review of the properties of epitaxial 4H silicon carbide polytype (4H-SiC) is presented, with particular emphasis on those aspects of this material related to room, high-temperature and harsh environment ionizing radiation detector operation.
Journal ArticleDOI
The physics of solid-state neutron detector materials and geometries
TL;DR: This review focuses on advances and challenges in charged-particle-based device geometries, materials and associated mechanisms for direct and indirect transduction of thermal to fast neutrons within the context of application.
Journal ArticleDOI
Demonstration of an SiC neutron detector for high-radiation environments
TL;DR: In this article, the authors demonstrate the viability of SiC-based detectors for a variety of radiation monitoring applications and demonstrate that they can achieve linear detector response up to thermal neutron fluxes of 2000 n/sub th//cm/sup 2/s.
Journal ArticleDOI
The fast neutron response of 4H silicon carbide semiconductor radiation detectors
TL;DR: In this article, fast neutron response measurements were reported for radiation detectors based on large-volume SiC p-i-n diodes, where multiple reaction peaks were observed for 14-MeV neutron reactions with the silicon and carbon nuclides in the SiC detector.
Journal ArticleDOI
Simultaneous measurement of neutron and gamma-ray radiation levels from a TRIGA reactor core using silicon carbide semiconductor detectors
TL;DR: In this paper, the ability of a silicon carbide radiation detector to measure neutron and gamma radiation levels in a TRIGA reactor's mixed neutron/gamma field was demonstrated, and the SiC detector showed a high level of precision for both neutrons and gamma rays in high-intensity radiation environments.
References
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Journal ArticleDOI
Development of a silicon carbide radiation detector
TL;DR: In this paper, the radiation detection properties of semiconductor detectors made of 4H silicon carbide were evaluated and the resolution of the Schottky SiC detector was 5.8% (FWHM) at an energy of 294 keV.
Journal ArticleDOI
Demonstration of an SiC neutron detector for high-radiation environments
TL;DR: In this article, the authors demonstrate the viability of SiC-based detectors for a variety of radiation monitoring applications and demonstrate that they can achieve linear detector response up to thermal neutron fluxes of 2000 n/sub th//cm/sup 2/s.
Journal ArticleDOI
Simultaneous measurement of neutron and gamma-ray radiation levels from a TRIGA reactor core using silicon carbide semiconductor detectors
TL;DR: In this paper, the ability of a silicon carbide radiation detector to measure neutron and gamma radiation levels in a TRIGA reactor's mixed neutron/gamma field was demonstrated, and the SiC detector showed a high level of precision for both neutrons and gamma rays in high-intensity radiation environments.
Journal ArticleDOI
Measurement of Absolute Fission Rates
TL;DR: The capability to measure absolute fission rates per nucleus at a remote laboratory site [the Coupled Fast Reactivity Measurement Facility (CFRMF) at Aerojet Nuclear Company] has been established as discussed by the authors.