emission of rays
1Emission theory (vision) — Emission theory or extramission theory is the proposal that visual perception is accomplished by rays of light emitted by the eyes. This theory has been replaced by intromission theory, which is that visual perception is accomplished by rays of… …
2Emission — may refer to: * Flue gas, also: ** Exhaust gas, flue gas occurring as a result of the combustion of a fuel * Emission of air pollutants * Emission (electromagnetic radiation), the process by which the energy of a photon is released by another… …
3Emission spectrum — The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted by the element s atoms or the compound s molecules when they are returned to a lower energy state. Each element s …
4Émission gamma induite — L émission gamma induite est un phénomène physique controversé consistant en l émission de rayons γ par un isomère nucléaire au cours d une transition isomérique au sein de son noyau déclenchée par une excitation extérieure, de manière comparable …
5émission gamma en cascade — pakopinė gama spinduliuotė statusas T sritis fizika atitikmenys: angl. cascade gamma rays; successive gamma rays vok. Kaskaden Gamma Strahlen, m; Kaskaden Gamma Strahlung, f rus. каскадное гамма излучение, n; каскадные гамма лучи, m pranc.… …
6Particle-induced X-ray emission — or proton induced X ray emission (PIXE) is a technique used in the determining of the elemental make up of a material or sample. When a material is exposed to an ion beam, atomic interactions occur that give off EM radiation of wavelengths in the …
7Particle-Induced X-ray Emission — or Proton Induced X ray Emission (PIXE) is a technique used in the determining of the elemental make up of a material or sample. When a material is exposed to an ion beam, atomic interactions occur that give off EM radiation of wavelengths in the …
8Single photon emission computed tomography — (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera. However, it is able to provide true 3D information.… …
9Induced gamma emission — In physics, induced gamma emission (IGE) refers to the process of fluorescent emission of gamma rays from excited nuclei, usually involving a specific nuclear isomer. It is analogous to conventional fluorescence, which is defined to be the… …
10positron emission tomography — (PET, positron emission computed tomography, PECT) a technique in nuclear medicine for cross sectional imaging that enables a noninvasive assessment and localization of metabolic activity to be made. Emission of a positron by a radioisotope… …
