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Sand for high-dose dosimetry using the EPR technique.

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

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|December 21, 2004

Summary

Brazilian beach sand shows promise as a dosimeter for high-dose measurements using electron paramagnetic resonance (EPR) technology. This EPR dosimetry method is reproducible, reusable, and suitable for medical, agricultural, and industrial applications.

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Area of Science:

Geophysics
Materials Science
Radiation Dosimetry

Background:

Sand contains heavy minerals, which can be sensitive to radiation.
Electron Paramagnetic Resonance (EPR) is a spectroscopic technique sensitive to unpaired electrons.

Purpose of the Study:

To evaluate Brazilian beach sand as a potential material for high-dose dosimetry.
To assess key dosimetric properties of sand samples for radiation measurement applications.

Main Methods:

Utilized electron paramagnetic resonance (EPR) spectroscopy.
Analyzed sand samples from various Brazilian beaches.
Investigated dosimetric properties including reproducibility, reusability, uniformity, detection range, and dose response.

Main Results:

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A significant increase in the EPR signal at g=1.999 was observed as a function of absorbed dose.
Sand samples exhibited favorable dosimetric properties for radiation measurement.
The EPR signal intensity correlated directly with the absorbed radiation dose.

Conclusions:

Brazilian beach sand is a viable and cost-effective material for high-dose EPR dosimetry.
The studied sand samples demonstrate potential for applications in medical, agricultural, and industrial radiation monitoring.
EPR dosimetry using sand offers a promising method for accurate high-dose measurements.