Radioactivity Measurements on Glazed Ceramic Surfaces

Area of Science:

• Materials Science
• Environmental Science
• Nuclear Chemistry

Background:

• Household and industrial ceramic items, along with specialty glass, are ubiquitous.
• Understanding their radioactivity content is crucial for safety and environmental assessments.

Purpose of the Study:

• To quantify radioactivity concentrations in common ceramic and glass materials.
• To identify the radionuclides present and their sources within these materials.

Main Methods:

• Alpha pulse counting and ion chamber voltage measurements were used for radioactivity assay.
• Gamma spectroscopy was employed for radionuclide identification.
• A (232)Th doped glass disc served as a calibration source.

Main Results:

• Radioactivity concentrations varied significantly, up to four orders of magnitude above background.
• Naturally occurring radionuclides from thorium and uranium series were detected in most samples.
• Ceramic glazes were identified as the primary contributors to radioactivity, though some unglazed samples also showed activity.

Conclusions:

• Common ceramic and glass products can exhibit notable radioactivity levels, mainly due to their glazes.
• The presence of natural radionuclides (thorium and uranium series) is widespread in these materials.
• Further investigation into the sensitivity of electret ion chamber devices for such measurements is warranted.