| 释义 |
DictionarySeeinteractionEncyclopediaSeeInteractionphotoelectric interaction
photoelectric interactionThe absorption of a photon by matter from its source of emission, producing a photoelectron and a K shell vacancy. The K shell vacancy is then filled by a cascade of electrons, each of which produces a characteristic photon. In clinical radiology, photoelectric absorption causes image contrast and increases the patient's exposure to scattered radiation. See also: interaction |