What question did this study set out to answer?

Develop traceable methods and stable reference sources for calibrating atmospheric radon detectors at low environmental concentrations below 100 Bq·m−3.

February 19, 2025Measurement SensorsOpen Access

Traceable low activity concentration calibration of radon detectors for climate change observation networks

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Authors

SRStefan RöttgerPhysikalisch-Technische Bundesanstalt ARAnnette RöttgerPhysikalisch-Technische Bundesanstalt FMFlorian MertesPhysikalisch-Technische Bundesanstalt

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Implication

Metrological study demonstrates traceable calibration for low radon activity concentrations between 1 and 50 Bq·m−3, supporting improved greenhouse gas dispersion modeling.

Key Points

Develop traceable methods and stable reference sources for calibrating atmospheric radon detectors at low environmental concentrations below 100 Bq·m−3.
Fabricated low-activity radium-226 reference sources down to a few becquerels using methods including ion implantation of mass-separated radium.
Generated stable reference atmospheres with low radon activity concentrations to benchmark detector performance.
Calibrated two high-sensitivity, large-volume prototype detectors with distinct operating principles at the PTB metrology institute.
Produced radium-226 reference sources achieving uncertainties as low as 2% (k = 1) even at the lowest activity levels.
Established traceable atmospheric radon activity calibrations across the 1 Bq·m−3 to 50 Bq·m−3 range with measurement uncertainties below 5% (k = 1).

Cite This Study

Röttger et al. (2025) studied this question.

synapsesocial.com/papers/6a83cd168dcee831255bcfd4 https://doi.org/10.1016/j.measen.2024.101708

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Implication

Metrological study demonstrates traceable calibration for low radon activity concentrations between 1 and 50 Bq·m−3, supporting improved greenhouse gas dispersion modeling.

Traceable low activity concentration calibration of radon detectors for climate change observation networks

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Member takes

Implication

Key Points

Cite This Study

Traceable low activity concentration calibration of radon detectors for climate change observation networks

Discussion

Member takes

Implication

Key Points

Cite This Study

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