Multi-energy neutron detector for counting thermal neutrons, high-energy neutrons, and gamma photons separately

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Description

This scintillation detector is composed of two scintillators optically coupled and mounted on a single photomultiplier tube. The first scintillator is a {sup 6}Li-loaded glass that has high efficiency for thermal neutrons, and the second is a liquid scintillator (BC 501) that has fairly high efficiency for higher energy neutrons. The {sup 6}Li glass scintillator emits light with a characteristic time constant of {approximately}60 ns, whereas light emitted in the liquid scintillator by proton recoil from energetic neutrons has a time constant of {approximately}30 ns and the time constant for scintillations occurring from gamma-scattered Compton electrons in the liquid scintillator ... continued below

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Pages: (4 p)

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Chiles, M.M.; Bauer, M.L. & McElhaney, S.A. January 1, 1989.

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Description

This scintillation detector is composed of two scintillators optically coupled and mounted on a single photomultiplier tube. The first scintillator is a {sup 6}Li-loaded glass that has high efficiency for thermal neutrons, and the second is a liquid scintillator (BC 501) that has fairly high efficiency for higher energy neutrons. The {sup 6}Li glass scintillator emits light with a characteristic time constant of {approximately}60 ns, whereas light emitted in the liquid scintillator by proton recoil from energetic neutrons has a time constant of {approximately}30 ns and the time constant for scintillations occurring from gamma-scattered Compton electrons in the liquid scintillator is {approximately}3.7 ns. These differences in light decay time constants make this detector conducive to electronic separation of pulses generated by the three different radiations. Thermal neutrons, high-energy neutrons, a gamma radiation can be counted separately by operating this detector with a pulse-shape discriminator recently developed. Experimental data demonstrates the proof of principle of this dual scintillator detector for many applications. 4 figs.

Physical Description

Pages: (4 p)

Notes

NTIS, PC A02/MF A01; OSTI; INIS; GPO Dep.

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  • IEEE nuclear science symposium and exhibits, San Francisco, CA (USA), 25-27 Oct 1989

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  • Other: DE90001960
  • Report No.: CONF-891087-6
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5412208
  • Archival Resource Key: ark:/67531/metadc1071128

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1989

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  • Feb. 4, 2018, 10:51 a.m.

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  • Feb. 16, 2018, 6:07 p.m.

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Chiles, M.M.; Bauer, M.L. & McElhaney, S.A. Multi-energy neutron detector for counting thermal neutrons, high-energy neutrons, and gamma photons separately, article, January 1, 1989; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1071128/: accessed March 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.