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The γ source geometry,the position of the source,the size of the detector and the detector walls,and the resolution function of the detector system is strongly affected the shape of the light output distribution of the detector.The resolution function of detector can be described by well-known formula[1-4].
The γ source geometry, the position of the source, the size of the detector and the detector walls, and the resolution function of the detector system is strongly affected the shape of the light output distribution of the detector. The resolution function of detector can be described by well-known formula [1-4].