Computation of Detection Efficiencies for NMIS Fast Plastic Scintillators Using a Thick Detector Model

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This report describes and compares the computation of the detection efficiencies for fast plastic scintillating detectors from their Time-of-Flight (TOF) spectrums using two different detector models. In the first method which assumes a thin detector model, a one-to-one correspondence between the energy of the neutron and the time bin in which it appears in the TOF spectrum is used in computing the detector efficiencies. In the second method which is based upon a thick detector model, the macroscopic cross sections of the detector materials are used to determine the path length of a neutron in the detector and hence its ... continued below

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Chiang, L.G. December 14, 2000.

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Description

This report describes and compares the computation of the detection efficiencies for fast plastic scintillating detectors from their Time-of-Flight (TOF) spectrums using two different detector models. In the first method which assumes a thin detector model, a one-to-one correspondence between the energy of the neutron and the time bin in which it appears in the TOF spectrum is used in computing the detector efficiencies. In the second method which is based upon a thick detector model, the macroscopic cross sections of the detector materials are used to determine the path length of a neutron in the detector and hence its time of detection. With this model, neutrons of a given energy E{sub n}, are distributed across several time bins in the TOF spectrum.

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  • Report No.: ORNL/TM-2000/316
  • Grant Number: DE-AC05-00OR22725
  • DOI: 10.2172/885836 | External Link
  • Office of Scientific & Technical Information Report Number: 885836
  • Archival Resource Key: ark:/67531/metadc891748

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  • December 14, 2000

Added to The UNT Digital Library

  • Sept. 23, 2016, 2:42 p.m.

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  • Dec. 2, 2016, 10:27 p.m.

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Chiang, L.G. Computation of Detection Efficiencies for NMIS Fast Plastic Scintillators Using a Thick Detector Model, report, December 14, 2000; [Tennessee]. (digital.library.unt.edu/ark:/67531/metadc891748/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.