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Area of Science:

  • Environmental Science
  • Materials Science
  • Physics

Background:

  • Radon detection is crucial for environmental and health monitoring.
  • Existing radon detection methods often lack real-time wireless capabilities.
  • Solid-state nuclear track (SSNT) detectors are sensitive but typically require offline analysis.

Purpose of the Study:

  • To develop a wireless magnetoelastic sensing method for radon determination using SSNTs.
  • To fabricate and characterize a novel radon sensor based on PMMA-coated magnetoelastic foils.
  • To establish the performance metrics of the developed sensor for radon concentration measurement.

Main Methods:

  • Fabrication of wireless sensors by coating polymethyl methacrylate (PMMA) film on magnetoelastic foils.
  • Utilizing the magnetoelastic sensing technique to detect resonance frequency shifts due to mass changes.
  • Exposure of sensors to radon, alpha-particle bombardment of PMMA, latent SSNT generation, chemical etching, and subsequent frequency shift measurement.

Main Results:

  • The developed SSNTs wireless magnetoelastic sensor demonstrated a linear response to radon concentration.
  • The method achieved a linear range of 1.20×10^5 to 3.60337199×10^6 Bq m⁻³ h.
  • A detection limit of 20.3×10^3 Bq m⁻³ h was achieved under optimized etching conditions (20% etchant, 80°C, 18 min).

Conclusions:

  • The SSNTs wireless magnetoelastic sensing method provides a viable approach for real-time radon monitoring.
  • The sensor shows promise for application in determining radon concentrations in air samples.
  • This technique offers a unique combination of wireless detection and SSNT sensitivity for radon assessment.