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Detectors
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The properties of an ideal detector for gamma-ray spectroscopy are:
  • output signal proportional to gamma-ray energy;
  • high efficiency i.e. high absorption coefficient;
  • easy mechanism for collecting the detector signal;
  • good energy resolution;
  • good stability over time, temperature and operating parameters.

The two main types of detector used for gamma-ray spectroscopy are:

  • semiconductor detectors; and
  • scintillation detectors.

This section contains the following topics:

Band structure in solids
Impurity types
Semiconductor detector
Scintillation detectors
Photomultiplier
Detector comparison
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