BEBIG COD 26 Measurements

All 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:

1. Certificate for sealed radioactive sources
2. Protocol of measurements page 1
3. Protocol of measurements page 2

On the certificate for sealed radioactive sources you will find the measured activity in the plaque and its calibration date. In the example below for plaque COD 26 the measured activity was 16.2 MBq on September 1, 2006.

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 COD 26 the measured dose rate is 123 mGy/min at 0.6 mm, 119 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 (145 mGy/min in this example).

On page 2 of the protocol of measurements (appendix to the certificate) you will find surface homogeneity measurements. The measurements hilighted in white, yellow, pink and blue are the ones that are used by PS. The measurements hilighted in purple lie beyond the edge of the plaque and will not be used.