Gamma discrimination in pillar structured thermal neutron

Detectors

Q. Shao, R. P. Radev, A. M. Conway, L. F. Voss, T. F. Wang, R. J. Nikolić, N. Deo, Chin Li "Barry" Cheung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Solid-state thermal neutron detectors are desired to replace 3He tube based technology for the detection of special nuclear materials. 3He tubes have some issues with stability, sensitivity to microphonics and very recently, a shortage of 3He. There are numerous solid-state approaches being investigated that utilize various architectures and material combinations. By using the combination of high-aspect-ratio silicon PIN pillars, which are 2 μm wide with a 2 μm separation, arranged in a square matrix, and surrounded by 10B, the neutron converter material, a high efficiency thermal neutron detector is possible. Besides intrinsic neutron detection efficiency, neutron to gamma discrimination is an important figure of merit for unambiguous signal identification. In this work, theoretical calculations and experimental measurements are conducted to determine the effect of structure design of pillar structured thermal neutron detectors including: intrinsic layer thickness, pillar height, substrate doping and incident gamma energy on neutron to gamma discrimination.

Original languageEnglish (US)
Title of host publicationChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII
DOIs
StatePublished - Dec 3 2012
EventChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII - Baltimore, MD, United States
Duration: Apr 24 2012Apr 27 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8358
ISSN (Print)0277-786X

Conference

ConferenceChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII
CountryUnited States
CityBaltimore, MD
Period4/24/124/27/12

Fingerprint

Neutron detectors
neutron counters
thermal neutrons
Neutron
Discrimination
discrimination
Neutrons
Detector
neutrons
Microphonism
tubes
solid state
Silicon
high aspect ratio
figure of merit
Tube
converters
Aspect ratio
Doping (additives)
Square matrix

Keywords

  • Boron
  • COMSOL simulation
  • Gamma discrimination
  • Monte Carlo simulation
  • Neutron detector
  • Pillar

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Shao, Q., Radev, R. P., Conway, A. M., Voss, L. F., Wang, T. F., Nikolić, R. J., ... Cheung, C. L. B. (2012). Gamma discrimination in pillar structured thermal neutron: Detectors. In Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII [83581N] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8358). https://doi.org/10.1117/12.918513

Gamma discrimination in pillar structured thermal neutron : Detectors. / Shao, Q.; Radev, R. P.; Conway, A. M.; Voss, L. F.; Wang, T. F.; Nikolić, R. J.; Deo, N.; Cheung, Chin Li "Barry".

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII. 2012. 83581N (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8358).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shao, Q, Radev, RP, Conway, AM, Voss, LF, Wang, TF, Nikolić, RJ, Deo, N & Cheung, CLB 2012, Gamma discrimination in pillar structured thermal neutron: Detectors. in Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII., 83581N, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8358, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII, Baltimore, MD, United States, 4/24/12. https://doi.org/10.1117/12.918513
Shao Q, Radev RP, Conway AM, Voss LF, Wang TF, Nikolić RJ et al. Gamma discrimination in pillar structured thermal neutron: Detectors. In Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII. 2012. 83581N. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.918513
Shao, Q. ; Radev, R. P. ; Conway, A. M. ; Voss, L. F. ; Wang, T. F. ; Nikolić, R. J. ; Deo, N. ; Cheung, Chin Li "Barry". / Gamma discrimination in pillar structured thermal neutron : Detectors. Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII. 2012. (Proceedings of SPIE - The International Society for Optical Engineering).
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