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Title: Neutron response function characterization of 4He scintillation detectors

Time-of-flight measurements were conducted to characterize the neutron energy response of pressurized 4He fast neutron scintillation detectors for the first time, using the Van de Graaff generator at Ohio University. The time-of-flight spectra and pulse height distributions were measured. This data was used to determine the light output response function, which was found to be linear at energies below 3.5 MeV. The intrinsic efficiency of the detector as a function of incident energy was also calculated: the average efficiency up to 10 MeV was 3.1%, with a maximum efficiency of 6.6% at 1.05 MeV. Furthermore, these results will enable development of neutron spectrum unfolding algorithms for neutron spectroscopy applications with these detectors.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Univ. of Florida, Gainesville, FL (United States)
  2. Arktis Radiation Detectors Ltd., Zurich (Switzerland)
  3. Ohio Univ., Athens, OH (United States)
Publication Date:
Grant/Contract Number:
NA0001837
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 793; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Ohio Univ., Athens, OH (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Science (NA-113)
Contributing Orgs:
University of Florida, Ohio University
Country of Publication:
United States
Language:
English
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; neutron detector; scintillators; ⁴He; time-of-flight
OSTI Identifier:
1339101