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A compact high-energy neutron spectrometer.

F D Brooks1, A Buffler, M S Allie

  • 1Department of Physics, University of Cape Town, Rondebosch, Cape 7700, South Africa. fbrooks@science.uct.ac.za

Radiation Protection Dosimetry
|June 19, 2007
PubMed
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A compact neutron spectrometer using liquid scintillator measures neutron energy spectra from 2-200 MeV. This device is suitable for various neutron fields and aids in radiation dose assessments.

Area of Science:

  • Nuclear instrumentation
  • Radiation detection and measurement

Background:

  • Accurate neutron spectroscopy is crucial for radiation safety and fundamental physics research.
  • Existing neutron spectrometers may have limitations in energy range, time structure compatibility, or portability.

Purpose of the Study:

  • To describe a compact liquid organic neutron spectrometer for measuring neutron fluence spectra.
  • To detail its application in radiation dose measurements.
  • To validate its performance using calibration and test measurements.

Main Methods:

  • Utilized a compact liquid organic neutron spectrometer with a single NE213 liquid scintillator (5 cm diameter x 5 cm).
  • Employed two-parameter data acquisition (pulse-height and pulse shape) for neutron event characterization.

Related Experiment Videos

  • Applied the Bayesian unfolding code MAXED for spectral analysis.
  • Performed calibration and tests using a pulsed neutron beam with a continuous energy spectrum.

    • Main Results:

    • Successfully measured neutron fluence spectra within the 2-200 MeV energy range.
    • Demonstrated suitability for neutron fields with diverse time structures.
    • Established the spectrometer's utility for radiation dose measurements.

    Conclusions:

    • The compact liquid organic neutron spectrometer provides effective neutron spectral measurements.
    • The device is versatile for various applications, including radiation dosimetry.
    • The MAXED code is a suitable tool for unfolding the spectral data.