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Improvement of the activity measurement method for solid dosimeters emitting X-rays.

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Summary

Researchers are improving methods to measure intermediate-energy neutrons (100keV-1MeV) using rhodium and niobium. This technique detects X-emitters formed via inelastic neutron scattering, enhancing material damage assessment in reactors.

Keywords:
(103m)Rh(93m)NbEfficiency calibrationFluorescenceSelf-attenuationX-ray

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Area of Science:

  • Nuclear physics
  • Materials science
  • Analytical chemistry

Background:

  • Intermediate-energy neutrons (100keV-1MeV) are crucial for understanding material damage in nuclear reactors.
  • Accurate measurement of these neutrons is challenging due to their complex interactions.

Purpose of the Study:

  • To enhance the measurement of intermediate-energy neutrons.
  • To validate a complex X-ray spectrometry technique for neutron detection.

Main Methods:

  • Utilizing inelastic neutron scattering reactions with rhodium (Rh) and niobium (Nb).
  • Formation of low-energy X-ray emitters: 103mRh and 93mNb.
  • X-ray spectrometry for quantitative analysis.

Main Results:

  • Improvements in X-ray spectrometry measurements.
  • Validation of self-attenuation and fluorescence correction methods.
  • Enhanced determination of emission intensity for 103mRh and 93mNb.

Conclusions:

  • The study provides validated methods for measuring intermediate-energy neutrons.
  • Improved accuracy in characterizing neutron-induced material damage.
  • Rh and Nb serve as effective detectors for intermediate-energy neutrons via X-ray emission.