On the certificate for sealed radioactive sources you will find the total apparent activity in the plaque and its calibration date. In the example below for plaque COB 932 the measured activity was 19.0 MBq on October 31, 2011.
BEBIG COB 932 MeasurementsAll of the required measurements are provided in the data sheets that come with your plaque. You will need to find these three documents that came with your plaque: |
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On the certificate for sealed radioactive sources you will find the total apparent activity in the plaque and its calibration date. In the example below for plaque COB 932 the measured activity was 19.0 MBq on October 31, 2011.
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On page 1 of the protocol of measurements (appendix to the certificate) you will find a central axis calibration graph and a table. In the example below for plaque COB 932 the measured dose rate is 135 mGy/min at 0.6 mm, 124 mGy/min at 1.0 mm, and so on. The measurements hilighted in yellow are the ones that are used by PS. You will need all the measurements from the upper table (0.6 to 10.0 mm) and the extrapolated dose rate at 0.0 mm from the lower table (157 mGy/min in this example). 
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On page 2 of the protocol of measurements (appendix to the certificate) you will find surface homogeneity measurements. The measurements hilighted in yellow are the ones that are used by PS. 
Now that you have accumulated all of the necessary measurement data you can create a model of the plaque. Click on this link to proceed to enter the measurement data. |