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A baseline for source localisation using the inverse modelling tool FREAR.

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    Scientists developed test cases using real radioactive detections to improve methods for pinpointing the source of airborne radioactivity. This aids the Comprehensive Nuclear-Test-Ban Treaty

    Keywords:
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    Area of Science:

    • Atmospheric science
    • Nuclear verification
    • Radiological monitoring

    Background:

    • A global network monitors airborne radioactivity for the Comprehensive Nuclear-Test-Ban Treaty.
    • Inverse atmospheric transport modeling helps identify radioactive release sources.

    Purpose of the Study:

    • To create realistic test cases for evaluating novel inverse modeling techniques.
    • To assess the performance of source localization algorithms.

    Main Methods:

    • Constructed two sets of test cases using real 133Xe detections from a medical isotope facility.
    • Applied various inverse modeling techniques and sensitivity experiments.
    • Developed metrics to quantify source localization accuracy.

    Main Results:

    • Successfully used test cases to determine the known location of the medical isotope facility.
    • Demonstrated the utility of the test cases for algorithm development.

    Conclusions:

    • The developed test cases are valuable for advancing inverse modeling in radioactive source identification.
    • This work supports the verification capabilities of the Comprehensive Nuclear-Test-Ban Treaty.