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Title: High-efficiency scintillation detector for combined detection of thermal and fast neutrons and gamma radiation

Abstract

A scintillation based radiation detector for the combined detection of thermal neutrons, high-energy neutrons and gamma rays in a single detecting unit. The detector consists of a pair of scintillators sandwiched together and optically coupled to the light sensitive face of a photomultiplier tube. A light tight radiation pervious housing is disposed about the scintillators and a portion of the photomultiplier tube to hold the arrangement in assembly and provides a radiation window adjacent the outer scintillator through which the radiation to be detected enters the detector. The outer scintillator is formed of a material in which scintillations are produced by thermal-neutrons and the inner scintillator is formed of a material in which scintillations are produced by high-energy neutrons and gamma rays. The light pulses produced by events detected in both scintillators are coupled to the photomultiplier tube which produces a current pulse in response to each detected event. These current pulses may be processed in a conventional manner to produce a count rate output indicative of the total detected radiation event count rate. Pulse discrimination techniques may be used to distinguish the different radiations and their energy distribution.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
6807626
Patent Number(s):
-US-A6019738
Assignee:
TIC; EDB-88-179255
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SOLID SCINTILLATION DETECTORS; DESIGN; FAST NEUTRONS; GAMMA RADIATION; INVENTIONS; RADIATION DETECTORS; THERMAL NEUTRONS; BARYONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; IONIZING RADIATIONS; MEASURING INSTRUMENTS; NEUTRONS; NUCLEONS; RADIATIONS; SCINTILLATION COUNTERS 440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation

Citation Formats

Chiles, M.M., Mihalczo, J.T., and Blakeman, E.D. High-efficiency scintillation detector for combined detection of thermal and fast neutrons and gamma radiation. United States: N. p., 1987. Web.
Chiles, M.M., Mihalczo, J.T., & Blakeman, E.D. High-efficiency scintillation detector for combined detection of thermal and fast neutrons and gamma radiation. United States.
Chiles, M.M., Mihalczo, J.T., and Blakeman, E.D. Fri . "High-efficiency scintillation detector for combined detection of thermal and fast neutrons and gamma radiation". United States.
@article{osti_6807626,
title = {High-efficiency scintillation detector for combined detection of thermal and fast neutrons and gamma radiation},
author = {Chiles, M.M. and Mihalczo, J.T. and Blakeman, E.D.},
abstractNote = {A scintillation based radiation detector for the combined detection of thermal neutrons, high-energy neutrons and gamma rays in a single detecting unit. The detector consists of a pair of scintillators sandwiched together and optically coupled to the light sensitive face of a photomultiplier tube. A light tight radiation pervious housing is disposed about the scintillators and a portion of the photomultiplier tube to hold the arrangement in assembly and provides a radiation window adjacent the outer scintillator through which the radiation to be detected enters the detector. The outer scintillator is formed of a material in which scintillations are produced by thermal-neutrons and the inner scintillator is formed of a material in which scintillations are produced by high-energy neutrons and gamma rays. The light pulses produced by events detected in both scintillators are coupled to the photomultiplier tube which produces a current pulse in response to each detected event. These current pulses may be processed in a conventional manner to produce a count rate output indicative of the total detected radiation event count rate. Pulse discrimination techniques may be used to distinguish the different radiations and their energy distribution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {2}
}