Method of detection of fast neutrons

Details Method of detection of fast neutrons Method of detection of fast neutrons

2009-05-04

2011-11-15

Hannaher, Constantine (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

Reexamination Certificate

active

08058624

ABSTRACT:
A simple method is developed for detection of fast neutrons for systems of detection of radioactive materials, which does not involve moderator systems, operates on the real time scale and ensures high detection efficiency. The method includes conversion of the cascade of gamma-quanta formed as a result of inelastic scattering of neutrons in a converter material with high atomic number into a set of light scintillations by a scintillator, processing of signals obtained in recording of said scintillations, formation of counting pulses with frequency proportional to the neutron flux and their recording according to an appropriate algorithm. Inorganic scintillators with high effective atomic number are used, and, as converter materials for inelastic scattering of neutrons, materials with high atomic numbers are used, which are a constituent part of said inorganic scintillators. Processing of the obtained signals is carried out by their integration with time constant of at least 30 microseconds, and formation of counting pulses is made by selection of the integrated signals in the energy range equivalent to 10-300 keV. Examples of inorganic scintillators comprising material with high effective atomic number used as the converter are crystals BGO, GSO, ZnWO, CWO, CsI(Tl), NaI(Tl), and LiI(Eu).

REFERENCES:
patent: 2854584 (1958-09-01), Youmans
patent: 3008045 (1961-11-01), Ruderman
patent: 5008067 (1991-04-01), Czirr
patent: 2129289 (1997-04-01), None
patent: 2088952 (1997-08-01), None
H. Klein et al., “Scintillation detectors for fast neutrons.” Proceedings of Science, Intl Workshop on Fast Neutron Detectors, U of Cape Town, South Africa, Apr. 3-6, 2006, pp. 1-24.
F. Tokanai et al., “Cold neutron imaging detection with a GSO scintillator.” Nucl. Inst. Meth. A452 (2000) 266-272.
C. M. Bartle et al., “Small inorganic scintillators as neutron detectors.” Nucl. Inst. Meth. A422 (1999) 54-58.
M. Anelli et al., “Measurement and simulation of the neutron response and detection efficiency of a Pb-scintillating fiber calorimeter,” Nuclear Instruments and Methods in Physics Research A 581 (2007) 368-371.
V. Nekrasov et al., “Scintillation blocks of high sensitivity for detection of gamma-radiation based on cadmium tungstate,” The First International Conference on Inorganic Scintillators and Their Application, SCINT99, Scientific Program and Abstracts, Aug. 16-30, 1999, Moscow, Russia.
V. Nekrasov et al., The use of y-detection block of the increased efficiency based on heavy scintillators in radiation safety control systems, Radiotekhnika: All-Urk. Sci. Interdep. Mag. 2004, No. 139, p. 130-135.
V. Ryzhikov et al., “Detection of thermal and resonance neutrons using oxide scintillators,” IEEE Transactions on Nuclear Science, vol. 47, No. 6, Dec. 2000, pp. 2061-2064.
V. Ryzhikov et al., “A high efficiency detection method of resonance and fast neutron fluxes for systems using inelastic scattering,” Proc. SORMA-2008 Conference, 2008.
V.V. Nekrasov, L.A. Piven, A.F. Koval et al., “A stationary customs inspection system for detection of fissionable and radioactive materials on the basis of a combined detection block,” East European Journal of Advanced Technologies, No. 412 (1b), 2005, p. 16-21.

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