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EPR dosimetry using commercial glasses for high gamma doses
Maria Inês Teixeira1, Gilberto M Ferraz, Linda V E Caldas
1Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, Rua Prof. Lineu Prestes, 2242 05508-900, São Paulo, Brazil. miteixei@ipen.br
Summary
Commercial glasses can serve as effective dosimeters for high gamma radiation doses. Electronic paramagnetic resonance (EPR) analysis confirmed their utility in measuring radiation exposure.
Area of Science:
- Materials Science
- Analytical Chemistry
- Radiation Physics
Background:
- Dosimetry is crucial for radiation safety and research.
- Electronic Paramagnetic Resonance (EPR) is a sensitive technique for detecting paramagnetic species.
- Iron (Fe3+) is a common impurity in glass that can be studied using EPR.
Purpose of the Study:
- To evaluate commercial transparent and colored glasses as dosimeters for high gamma doses.
- To investigate the feasibility of using EPR spectroscopy for quantitative dosimetry with these glasses.
Main Methods:
- Samples of commercial transparent, bronze, brown, and green glasses were analyzed.
- Electronic Paramagnetic Resonance (EPR) spectroscopy was employed to study the glasses.
- EPR spectra were analyzed for characteristic signals, particularly Fe3+ signals at g=4.27 and g=2.01.
Main Results:
- All studied glass samples exhibited characteristic Fe3+ signals in their EPR spectra.
- The EPR signal at g=2.01 demonstrated a more suitable and consistent behavior for developing a calibration curve.
- The results indicate that all tested glass types are useful for high-dose dosimetry.
Conclusions:
- Commercial glasses, including transparent and colored variants, are viable and useful dosimeters for high gamma doses.
- EPR spectroscopy, specifically monitoring the Fe3+ signal at g=2.01, provides a reliable method for quantifying high gamma radiation exposure using these glasses.