scintillation
21Scintillation (astronomy) — Scintillation or twinkling are generic terms for rapid variations in apparent brightness or color of a distant luminous object viewed through the atmosphere.If the object lies outside the earth s atmosphere, as in the case of stars and planets,… …
22Scintillation (physics) — Scintillation is a flash of light produced in a transparent material by an ionization event. See scintillator and scintillation counter for practical applications.OverviewThe process of scintillation is one of luminescence whereby light of a… …
23Scintillation (radar) — Scintillation is a fluctuation in the amplitude of a target on a radar display. It is closely related to target glint, or wander, an apparent displacement of the target from its mean position. This effect can be caused by a shift of the effective …
24scintillation camera — n a camera that records scintillations * * * an electronic instrument that produces photographs or cathode ray tube images of the gamma ray emissions from organs containing tracer compounds; the original and most commonly used type is the Anger… …
25scintillation counter — n a device for detecting and registering individual scintillations (as in radioactive emission) called also scintillometer * * * a device to measure and record the fluorescent flashes in a scintillator exposed to high energy radiation. * * * an… …
26scintillation counter — n. an instrument for detecting and measuring the scintillations induced by ionizing radiation in a crystal or phosphor …
27scintillation camera — scintillation camera, a photographic camera whi records the scintillations of radiation, used especially to trace the distribution of radioactive substances in the body …
28scintillation plastic — scintillation plastic, a plastic that gives off flashes of light when exposed to radioactive energy, used to detect nuclear and cosmic radiation …
29Scintillation (étoile) — Pour les articles homonymes, voir Scintillation. En astronomie, la scintillation est la fluctuation rapide de l éclat lumineux des étoiles lorsqu on les observe à l œil nu. Elle est due au faible éclat des étoiles et aux turbulences dans l… …
30Scintillation counter — A scintillation counter measures ionizing radiation. The sensor, called a scintillator, consists of a transparent crystal, usually phosphor, plastic (usually containing anthracene), or organic liquid (see liquid scintillation counting) that… …
