July 2018
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71 Reads
The activity of Ra-226 was determined using Alpha-spectrometry. The necessary relevant information was obtained from the method validation data, the quality control data and equitment calibration certificates. The activity concentration of Ra-226 in sample (Bq/L), is calculated by: Recovery obtained by gamma spectrometry und Alpha spectrometer effciency. The method of measurement is described together with the measurement equation, selected traceable reference standards and the associated measurement uncertainty. The major sources of uncertainty of the result of measurment were indentified and the combined uncertainty was calculated. Identification of the main uncertainty sources represent basis for target operation for reducing the measurement uncertainty of this determination.