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Title: Development of a new method for measurement of neutron detector efficiency up to 20 MeV

A new approach to neutron detector efficiency has been taken. A neutron detector has been calibrated with a 252Cf source at low energy. The calibration can be extended to energies above 8 MeV based on the 252Cf results. The techniques uses the fact that the cross section for a symmetric reaction with nucleus of atomic number A yielding a final nucleus with atomic number (2A-1) and a neutron A + A → (2A – 1) + n. This reaction must be symmetric about 90° in the center-of-mass system. Furthermore, the laboratory energies for the neutrons at the paired energies differ substantially. Thus, an efficiency known at one of the two angles can be used to determine the efficiency to higher energies or, for a negative Q, to lower neutron energies.
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  1. Ohio Univ., Athens, OH (United States)
  2. National Institute of Standards and Technology, Gaithersburg, MD (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Guelma, Guelma (Algeria)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nuclear Data Sheets
Additional Journal Information:
Journal Volume: 119; Journal Issue: C; Journal ID: ISSN 0090-3752
Research Org:
Ohio Univ., Athens, OH (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA, Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Department of Physics, University of Guelma, Guelma 24000, Algeria
Country of Publication:
United States
73 NUCLEAR PHYSICS AND RADIATION PHYSICS neutron; efficiency; calibration; symmetric reactions