If answer is yes, then please provide:

If Sarpagan or Marinelli, then please provide:

If Marinelli, then please provide:

If point source or frontal beam, then please provide:

For beta and alpha measurements, a virtual threshold parameter may be required. If the plateau is not an ideal straight line, then measure a known source at about the end of plateau. Calculate efficiency. At this stage, the efficiency should match the Monte-Carlo simulated efficiency, because all quanta reach the detector without impediment. Then, set the working voltage at your leisure. Calculate again the efficiency. Adjust VIRTUAL THRESHOLD to match.

If the energy deposit in active detector is between incident energy-peak window and incident energy then, a count is scored in the peak region!