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Related Experiment Video

Updated: Nov 25, 2025

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
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A moveable neutron imaging facility using D-T neutron source based on a compact accelerator.

Sheng Wang1, Wei Yin1, Bin Liu1

  • 1Institute of Nuclear Physics and Chemistry, CAEP, Mianyang of Sichuan Prov., 621900, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 18, 2020
PubMed
Summary

A new portable neutron imaging system using a compact D-T neutron source was developed. This system achieves high-resolution thermal neutron radiography and fast neutron radiography for detailed material analysis.

Keywords:
Compact acceleratorD-T neutron sourceNeutron radiographyNeutron tomography

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Area of Science:

  • Nuclear Physics
  • Materials Science
  • Imaging Technology

Background:

  • Neutron imaging offers unique material penetration capabilities.
  • Developing compact, versatile neutron sources is crucial for broader applications.
  • Existing facilities can be limited in mobility and accessibility.

Purpose of the Study:

  • To construct and evaluate a moveable, multi-use neutron imaging facility.
  • To assess the imaging quality of the system for radiography and tomography.
  • To determine the resolution limits for thermal and fast neutron imaging.

Main Methods:

  • Construction of a neutron imaging facility utilizing a compact deuterium-tritium (D-T) neutron generator.
  • Performance evaluation using standard samples for thermal and fast neutron radiography.
  • Application of thermal and fast neutron tomography for material reconstruction.

Main Results:

  • The system demonstrated a smallest resolvable slit width of 0.06 mm using thermal neutron radiography.
  • The smallest resolvable hole diameter was 0.5 mm with fast neutron radiography.
  • Clear reconstruction of a 0.2 mm gadolinium wire and light material holes was achieved.

Conclusions:

  • The developed moveable neutron imaging facility is effective for high-resolution radiography and tomography.
  • The system provides valuable insights into material structures using both thermal and fast neutrons.
  • This technology enables advanced non-destructive testing and material characterization.