Tool: Measurement Uncertainty in Collimated Geometry
The evaluation of measurements in collimated geometry according to Filß is based on the model description
\[ A = M \cdot \left[ \frac{1}{\epsilon} \cdot \frac{1}{\eta} \cdot \left( \frac{\mu }{\rho} \right) \cdot \frac{1}{F_0} \cdot \frac{K_2}{K_1} \right] \cdot Z \]
It takes into account the DIN ISO 11929 in the version of November 2021.
Information on using the tool can be found at the end of the page.
Usage
The tool is used to evaluate a measurement in collimated geometry for one characteristic gamma line. Information about the individual data can be obtained through tooltips that pop up when hovering over the respective parameters.
Section 1: Measurement data
Enter the information (background area and net peak area) for the characteristic gamma line for which you want to perform the evaluation, as well as the measurement time (Live Time)
Section 2: Measurement parameters
Enter all other parameters of the measurement here.
Section 3: Correction factors
The evaluation model for the activity calculation of a measurement in collimated geometry according to Filß uses two correction factors. You can determine these with the corresponding tools (K1, K2) or estimate their uncertainties by varying the parameters there.
Section 4: Quantiles
Here you can specify the probabilities to be used for determining the detection, limit of detection, and confidence limits.
Section 5: Results
The determined values for the characteristic gamma line are displayed here.
Section 6: Reference value
By specifying a reference value (yr > 0 Bq), it can be checked whether the activity indicated by the reference value can be determined with the specified parameters.
Section 7: Summary
A textual assessment is provided here based on your inputs.
