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- Gamma_ray abstract "Gamma radiation, also known as gamma rays, and denoted by the Greek letter γ, refers to electromagnetic radiation of extremely high frequency and therefore high energy per photon. Gamma rays are ionizing radiation, and are thus biologically hazardous. They are classically produced by the decay from high energy states of atomic nuclei (gamma decay), but are also created by other processes. Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900, while studying radiation emitted from radium. Villard's radiation was named "gamma rays" by Ernest Rutherford in 1903.Natural sources of gamma rays on Earth include gamma decay from naturally occurring radioisotopes, and secondary radiation from atmospheric interactions with cosmic ray particles. Rare terrestrial natural sources produce gamma rays that are not of a nuclear origin, such as lightning strikes and terrestrial gamma-ray flashes. Additionally, gamma rays are also produced by a number of astronomical processes in which very high-energy electrons are produced, that in turn cause secondary gamma rays via bremsstrahlung, inverse Compton scattering and synchrotron radiation. However, a large fraction of such astronomical gamma rays are screened by Earth's atmosphere and can only be detected by spacecraft.Gamma rays typically have frequencies above 10 exahertz (or >1019 Hz), and therefore have energies above 100 keV and wavelengths less than 10 picometers (less than the diameter of an atom). However, this is not a hard and fast definition, but rather only a rule-of-thumb description for natural processes. Gamma rays from radioactive decay are defined as gamma rays no matter what their energy, so that there is no lower limit to gamma energy derived from radioactive decay. Gamma decay commonly produces energies of a few hundred keV, and almost always less than 10 MeV. In astronomy, gamma rays are defined by their energy, and no production process need be specified. The energies of gamma rays from astronomical sources range over 10 TeV, at a level far too large to result from radioactive decay. A notable example is extremely powerful bursts of high-energy radiation normally referred to as long duration gamma-ray bursts, which produce gamma rays by a mechanism not compatible with radioactive decay. These bursts of gamma rays, thought to be due to the collapse of stars called Hypernovae, are the most powerful events so far discovered in the cosmos.".
- Gamma_ray thumbnail Gamma_Decay.svg?width=300.
- Gamma_ray wikiPageExternalLink gamma.html.
- Gamma_ray wikiPageExternalLink toi.
- Gamma_ray wikiPageExternalLink livechart.
- Gamma_ray wikiPageExternalLink faq.html.
- Gamma_ray wikiPageExternalLink radiation.
- Gamma_ray wikiPageExternalLink pwav46.htm.
- Gamma_ray wikiPageExternalLink radinf.
- Gamma_ray wikiPageExternalLink www.radiationanswers.org.
- Gamma_ray wikiPageExternalLink index.html.
- Gamma_ray wikiPageID "18616290".
- Gamma_ray wikiPageRevisionID "606523140".
- Gamma_ray hasPhotoCollection Gamma_ray.
- Gamma_ray subject Category:Electromagnetic_spectrum.
- Gamma_ray subject Category:Gamma_rays.
- Gamma_ray subject Category:IARC_Group_1_carcinogens.
- Gamma_ray subject Category:Nuclear_physics.
- Gamma_ray subject Category:Radiation.
- Gamma_ray subject Category:Radioactivity.
- Gamma_ray comment "Gamma radiation, also known as gamma rays, and denoted by the Greek letter γ, refers to electromagnetic radiation of extremely high frequency and therefore high energy per photon. Gamma rays are ionizing radiation, and are thus biologically hazardous. They are classically produced by the decay from high energy states of atomic nuclei (gamma decay), but are also created by other processes.".
- Gamma_ray label "Gamma ray".
- Gamma_ray label "Gammastrahlung".
- Gamma_ray label "Gammastraling".
- Gamma_ray label "Promieniowanie gamma".
- Gamma_ray label "Radiação gama".
- Gamma_ray label "Raggi gamma".
- Gamma_ray label "Rayon gamma".
- Gamma_ray label "Rayos gamma".
- Gamma_ray label "Гамма-излучение".
- Gamma_ray label "أشعة غاما".
- Gamma_ray label "ガンマ線".
- Gamma_ray label "伽马射线".
- Gamma_ray sameAs Záření_gama.
- Gamma_ray sameAs Gammastrahlung.
- Gamma_ray sameAs Ακτίνες_γ.
- Gamma_ray sameAs Rayos_gamma.
- Gamma_ray sameAs Gamma_izpi.
- Gamma_ray sameAs Rayon_gamma.
- Gamma_ray sameAs Sinar_gama.
- Gamma_ray sameAs Raggi_gamma.
- Gamma_ray sameAs ガンマ線.
- Gamma_ray sameAs 감마선.
- Gamma_ray sameAs Gammastraling.
- Gamma_ray sameAs Promieniowanie_gamma.
- Gamma_ray sameAs Radiação_gama.
- Gamma_ray sameAs m.038yw.
- Gamma_ray sameAs Q11523.
- Gamma_ray sameAs Q11523.
- Gamma_ray wasDerivedFrom Gamma_ray?oldid=606523140.
- Gamma_ray depiction Gamma_Decay.svg.
- Gamma_ray isPrimaryTopicOf Gamma_ray.
