ASTM E181-10 Test method for Detector Calibration and Analysis of Radionuclides

ASTM E181 covers the procedure for calibration of a radiation detector and analysis of radionuclides. For each radionucl ide, one or more of these methods can be applied.... Read More

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    Scope:

    The ASTM E181 methods are concerned only with specific radionuclide measurements. The chemical and physical properties of the radionuclides are not within the scope of this standard. The measurement standards appear in the following order.

    Spectroscopy MethodsSection
    Calibration and Usage of Germanium Detectors3-12
    Calibration and Usage of Scintillation Detector Systems13-20
    Calibration and Usage of Scintillation Detectors for Simple Spectra16
    Calibration and Usage of Scintillation Detectors for Complex Spectra17
    Counting Methods
    Beta Particle Counting25-26
    Aluminum Absorption Curve27-31
    Alpha Particle Counting32-39
    Liquid Scintillation Counting40-48

    Results:

    Full peak efficiency of germanium detectors, scintillation detector systems, scintillation detectors for simple spectra, and scintillation detectors for complex spectra can be calculated by ASTM E181 testing using the following formula:

    where:

    Ef = full-energy peak efficiency (counts per gamma-ray emitted),

    Np = net gamma-ray count in the full-energy peak (counts per second live time)

    Ng = gamma-ray emission rate (gamma rays per second).

    Conclusion:

    ASTM E181 covers the procedure for calibration of a radiation detector and analysis of radionuclides. For each radionuclide, one or more of these methods can be applied. 

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