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Low Afterglow Composite Scintillator for Real-Time X-Ray Imaging.

Xiangzhou Zhang1, Yeqi Liu2, Nianqiao Liu3

  • 1School of Materials Science and Engineering, Shandong University, Jinan 250061, China.

Materials (Basel, Switzerland)
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed new rare-earth fluoride nanocrystals (NaLuF4) that significantly reduce persistent afterglow, a common issue in X-ray imaging. This breakthrough enables clearer, real-time imaging for medical and industrial applications.

Keywords:
Ce3+/Tb3+ co-doped NaLuF4X-ray imaginglow afterglow

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Radiological Physics

Background:

  • Rare-earth fluoride nanocrystals are promising scintillators for X-ray imaging.
  • Persistent afterglow in these materials hinders dynamic imaging due to deep trap states.
  • This afterglow causes signal overlap and image artifacts.

Purpose of the Study:

  • To develop Ce3+/Tb3+ co-doped NaLuF4 nanoscintillators with suppressed afterglow.
  • To overcome the limitations of persistent afterglow in scintillator applications.
  • To enable real-time, high-quality X-ray imaging.

Main Methods:

  • Co-doping NaLuF4 host with Ce3+ and Tb3+ ions.
  • Incorporating optimized nanocrystals into a poly(vinyl alcohol) matrix.
  • Fabricating transparent, high-loading composite scintillator films.

Main Results:

  • Ce3+ doping successfully quenched long afterglow without reducing Tb3+ radioluminescence efficiency.
  • Composite films exhibited negligible afterglow, high spatial resolution, and excellent radiation stability.
  • Targeted ion doping effectively suppressed afterglow in rare-earth fluoride scintillators.

Conclusions:

  • The developed nanoscintillators offer a viable solution for afterglow reduction in X-ray imaging.
  • This strategy paves the way for advanced real-time X-ray imaging technologies.
  • Applications include medical diagnostics and industrial inspection requiring high image quality.