million electron-volts
21Electromagnetic pulse — Ebomb redirects here. For EBOM, see Engineering bill of materials. This article is about the general weapons effect. For other uses, see the more specific topic (for example, Electromagnetic forming) An electromagnetic pulse (sometimes… …
22gamma ray — Physics. 1. a photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus. 2. a photon emitted by an electron as a result of internal conversion. 3. electromagnetic radiation with wavelengths shorter than… …
23surface analysis — ▪ chemistry Introduction in analytical chemistry (chemistry), the study of that part of a solid that is in contact with a gas or a vacuum. When two phases of matter are in contact, they form an interface. The term surface is usually… …
24nuclear reactor — Physics. reactor (def. 4). Also called nuclear pile. [1940 45] * * * Device that can initiate and control a self sustaining series of nuclear fission reactions. Neutrons released in one fission reaction may strike other heavy nuclei, causing them …
25MeV. — or mev «mehv», noun. a million electron volts, used as a measure of energy in nuclear physics. ╂[< m(illion) e(lectron) v(olts)] Mev., million electron volts. MeV., British …
26Mev. — or mev «mehv», noun. a million electron volts, used as a measure of energy in nuclear physics. ╂[< m(illion) e(lectron) v(olts)] Mev., million electron volts. MeV., British …
27quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… …
28Compton Gamma Ray Observatory — ▪ United States satellite U.S. satellite, one of the National Aeronautics and Space Administration (NASA) “Great Observatories” satellites, which is designed to identify the sources of celestial gamma rays (gamma ray). In operation from 1991 to… …
29cyclotron — /suy kleuh tron , sik leuh /, n. Physics. an accelerator in which particles are propelled in spiral paths by the use of a constant magnetic field. [1930 35; CYCLO + TRON] * * * Particle accelerator that accelerates charged atomic or subatomic… …
30fusion reactor — Physics. a reactor for producing atomic energy by nuclear fusion. Cf. reactor (def. 4). * * * Introduction also called fusion power plant or thermonuclear reactor a device to produce electrical power from the energy released in a nuclear… …
