title: An interesting form of high-energy gamma-ray--detector interaction and its effect on spectral peak centroid determination.
abstract: The pulse-height continuum produced in a radiation detector following the interaction of photons by pair-production is discussed. The event when one annihilation photon escapes from the detector without interaction while the other escapes after one Compton scattering interaction produces a characteristic component in the pulse-height spectrum. The significance of this component in influencing the accurate determination of the centroid of the double-escape peak is examined and shown to be negligibly small.
mesh_terms: D005720:Gamma Rays; D011834:Radiation Monitoring / Q000295:instrumentation*