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GENERALISATION OF RADIATOR DESIGN TECHNIQUES FOR PERSONAL NEUTRON DOSEMETERS BY UNFOLDING METHOD.

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A new radiator design for personal neutron dosemeters using plastic track detectors was developed. This optimized multi-layer radiator controls energy dependence within 18% for improved neutron detection.

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Area of Science:

  • Radiation detection and measurement
  • Materials science for radiation dosimetry
  • Nuclear instrumentation

Background:

  • Personal neutron dosimetry relies on accurate detection of neutrons across various energies.
  • Plastic track detectors offer a passive method for neutron detection.
  • Optimizing radiator design is crucial for improving the energy response of neutron dosemeters.

Purpose of the Study:

  • To develop a novel radiator design for personal neutron dosemeters using plastic track detectors.
  • To systematically estimate an ideal radiator with arbitrary hydrogen concentration.
  • To create a practical radiator using commercially available materials with minimized layers.

Main Methods:

  • Utilized unfolding calculations to estimate an ideal radiator composition.
  • Employed iterative calculations of double integrals for optimizing layer thicknesses in previous work.
  • Selected realistic, commercially available materials (polyethylene, Upilex, Kapton) for radiator construction.
  • Evaluated the energy dependence of the designed radiator from 0.1 to 20 MeV.

Main Results:

  • A three-layer radiator composed of polyethylene, Upilex, and Kapton sheets was designed.
  • The designed radiator demonstrated controlled energy dependence within an 18% deviation for neutron energies between 0.1 and 20 MeV.
  • The study explored the applicability of fluorescent nuclear track detector elements.

Conclusions:

  • The proposed multi-layer radiator design offers a systematic and practical approach for personal neutron dosimetry.
  • The optimized radiator design significantly improves the energy response of plastic track detector-based neutron dosemeters.
  • Further investigation into fluorescent nuclear track detectors may enhance dosemeter capabilities.