The scintillator consists of a transparent crystal, usually a phosphor, plastic (usually containing anthracene) or organic liquid (see liquid scintillation counting) that fluoresces when struck by ionizing radiation.
In this way, what is a scintillator used for?
Cesium iodide (CsI) in crystalline form is used as the scintillator for the detection of protons and alpha particles. Sodium iodide (NaI) containing a small amount of thallium is used as a scintillator for the detection of gamma waves and zinc sulfide (ZnS) is widely used as a detector of alpha particles.
How does a scintillation counter differ from a Geiger counter?
Both a Geiger counter and a scintillation counter are devices that measure ionizing radiation, so there is some overlap between them. The purpose of each is to detect the emission of nuclear radiation when atoms decompose. A Geiger counter works by detecting the effect of radiation through a low pressure gas tube.
What is the purpose of a photomultiplier tube?
A photomultiplier tube, useful for light detection of very weak signals, is a photoemissive device in which the absorption of a photon results in the emission of an electron. These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux.