Used in the detection of [[gamma ray|gamma]] or [[neutron]] [[radiation]]. Consists of both a detector of incident [[radiation]] and a [[photomultiplier]] to produce countable pulses. The type of phosphor used as the detector is dependent on the type of radiation (i.e., gamma ray or neutron) to be detected. Gamma radiation produces [[scintillation|scintillations]] in the phosphor as a result of [[photoelectric absorption]], [[Compton scattering]], or [[pair production]], depending on the energy of the incident gamma. The intensity of the scintillation and the amplitude of the resulting pulse are proportional to the energy of the incident neutron or gamma ray. Scintillation detectors are efficient and can be made in small sizes. This results in high [[vertical resolution]]. Scintillation detectors are used in [[radioactivity log|radioactivity logging]], [[neutron log|neutron logging]], and [[pulsed neutron log|pulsed neutron logging]]. See also [[photomultiplier]].