Due to interference between LaBr detectors, the code can exclude certain detector pairings based on their position.

In order to do this the code uses these variables (which can be found and set in Detector_System_Setup_File.txt)

Min_Distance_Nearest_Neighbour_Exclusion(mm): 0

Nearest_Neighbour_Exclusion: 0

Only_Exclude_Detectors_In_Same_Ring: 0

Output_Matrix_Of_Excluded_Detector_Pairings: 1

The setup shown above will give minimal exclusion (only excluding pairs with the same detector).

Output_Matrix_Of_Excluded_Detector_Pairings

If this variable is set to 1 the code will output a file with a matrix of Xs and 0s for excluded and non-excluded detector pairings.

How the Code Excludes Detector Pairings

The following flowchart explains how the detector exclusion works;

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images/Detector_Exclusion.png

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*Nearest Neighbour refers to the two detectors in the same ring and any adjacent rings that are the closest to the detector in question. So all detectors on the middle ring have 6 nearest neighbours (2 in the middle ring and 2 in each outer ring), whereas detectors on the outer rings have 4 (2 in their own ring, and 2 in the middle ring).