TY - JOUR
T1 - Thin film CdTe based neutron detectors with high thermal neutron efficiency and gamma rejection for security applications
AU - Smith, L.
AU - Murphy, J. W.
AU - Kim, J.
AU - Rozhdestvenskyy, S.
AU - Mejia, I.
AU - Park, H.
AU - Allee, David
AU - Quevedo-Lopez, M.
AU - Gnade, B.
N1 - Funding Information:
We acknowledge the support of the United States Department of Homeland Security Grant #2012-ON-077-ARI-060-03 . We appreciate QSA Global Inc. for the generous use of a 252 Cf source. We would also like to express gratitude to Kookmin University and Ms. Kayoung Yun for their support and assistance.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Solid-state neutron detectors offer an alternative to 3He based detectors, but suffer from limited neutron efficiencies that make their use in security applications impractical. Solid-state neutron detectors based on single crystal silicon also have relatively high gamma-ray efficiencies that lead to false positives. Thin film polycrystalline CdTe based detectors require less complex processing with significantly lower gamma-ray efficiencies. Advanced geometries can also be implemented to achieve high thermal neutron efficiencies competitive with silicon based technology. This study evaluates these strategies by simulation and experimentation and demonstrates an approach to achieve >10% intrinsic efficiency with <10−6 gamma-ray efficiency.
AB - Solid-state neutron detectors offer an alternative to 3He based detectors, but suffer from limited neutron efficiencies that make their use in security applications impractical. Solid-state neutron detectors based on single crystal silicon also have relatively high gamma-ray efficiencies that lead to false positives. Thin film polycrystalline CdTe based detectors require less complex processing with significantly lower gamma-ray efficiencies. Advanced geometries can also be implemented to achieve high thermal neutron efficiencies competitive with silicon based technology. This study evaluates these strategies by simulation and experimentation and demonstrates an approach to achieve >10% intrinsic efficiency with <10−6 gamma-ray efficiency.
KW - CdTe
KW - Low cost detection methods
KW - Neutron detection
KW - Semiconductor radiation detectors
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U2 - 10.1016/j.nima.2016.09.026
DO - 10.1016/j.nima.2016.09.026
M3 - Article
AN - SCOPUS:84988531040
VL - 838
SP - 117
EP - 123
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -