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Compton edge information


In gamma-ray spectrometry, the Compton edge is a feature of the measured gamma-ray energy spectrum that results from Compton scattering in a scintillator or a semiconductor detector.

When a gamma ray scatters within the detector and the scattered photon escapes from the detector's volume, only a fraction of the incident energy is deposited in the detector.[1] This fraction depends on the scattering angle of the photon, leading to a spectrum of energies corresponding to the entire range of possible scattering angles. The highest energy that can be deposited, corresponding to full backscatter, is called the Compton edge. In mathematical terms, the Compton edge is the inflection point of the high-energy side of the Compton region.[2]

  1. ^ Knoll, Glenn F. Radiation Detection and Measurement 2000. John Wiley & Sons, Inc.
  2. ^ Prekeges, Jennifer (2010). Nuclear medicine instrumentation. Sudbury, Massachusetts: Jones and Bartlett Publishers. p. 42. ISBN 9781449611125.

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