gamma - определение. Что такое gamma
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Что (кто) такое gamma - определение

THIRD LETTER OF THE GREEK ALPHABET
Gamma (letter); Γ; Gama (letter); Gammas; \gamma; Γάμμα; ℽ; ℾ; Gamma (Greek); Gamma (unit of induction); Gamma (unit of mass); Gamma (unit (induction)); Gamma (unit (mass)); Gamma (Greek letter)
  • The alphabet on [[black-figure pottery]] with a [[lambda]]-shaped gamma
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gamma         
(gammas)
Gamma is the third letter of the Greek alphabet.
N-VAR
gamma         
['gam?]
¦ noun
1. the third letter of the Greek alphabet (?, ?), transliterated as 'g'.
[as modifier] denoting the third in a series of items or categories.
Brit. a third-class mark given for a piece of work.
2. [as modifier] relating to gamma rays.
3. (plural same) Physics a unit of magnetic field strength equal to 10-5 oersted.
Origin
via L. from Gk.
Gamma         
·noun The third letter (/, / = ·Eng. G) of the Greek alphabet.
GAMMA         
<language> 1. A language for matrices and generation of mathematical programming reports. ["GAMMA 3.3 for MPS/MPSX, IBM System:/360", Bonnor & Moore Assocs (Mar 1975)]. 2. A high-level parallel language. [Research Directions in High-Level Parallel Languages, LeMetayer ed, Springer 1992]. (1994-11-29)
Northrop Gamma         
  • [[Jacqueline Cochran]]'s Northrop Gamma 2G with Curtiss Conqueror V-12 engine
  • The ''Polar Star'' on display at the National Air and Space Museum
  • Jianqiao Aerodrome]] standing before the assembly of a Gamma 2E; circa 1936
1932 CARGO TRANSPORT AIRCRAFT FAMILY BY NORTHROP
C-100 Gamma; Northrop C-100 Gamma; Northrop 2; Northrop 5; Northrop BXN; Northrop BXN1; Northrop BXN2; Northrop Gamma 2L; Northrop 2B Gamma
The Northrop Gamma was a single-engine all-metal monoplane cargo aircraft used in the 1930s. Towards the end of its service life, it was developed into the A-17 light bomber.
Gamma (wasp)         
GENUS OF INSECTS
Gamma (genus)
Gamma is a small neotropical, primarily northern Andean genus of potter wasps currently containing 6 recognized species.
Gamma (eclipse)         
PARAMETER OF AN ECLIPSE THAT DESCRIBES HOW CENTRALLY THE SHADOW OF THE MOON OR EARTH STRIKES THE OTHER
Gamma (solar eclipse)
Gamma (denoted as γ) of an eclipse describes how centrally the shadow of the Moon or Earth strikes the other body. This distance, measured at the moment when the axis of the shadow cone passes closest to the center of the Earth or Moon, is stated as a fraction of the equatorial radius of the Earth or Moon.
Latin gamma         
  • Pictogram of a Camel
  • Early Etruscan C
  • Early Greek Gamma
  • Gimel
LETTER OF THE LATIN ALPHABET
Ɣ; Latin Gamma
The Latin letter gamma, Ɣ (minuscule: ɣ), is a letter used in some orthographies based on the Latin alphabet. Its uppercase and lowercase shape is based on the lowercase shape of the Greek letter gamma (γ).
Gamma (band)         
AMERICAN BAND
Gamma was an American band formed by guitarist Ronnie Montrose and singer Davey Pattison in San Francisco, California, United States in 1979. They released four albums: Gamma 1 (1979), Gamma 2 (1980), Gamma 3 (1982) (all on Elektra Records) and Gamma 4 (2000).
Gamma ray         
  • Gamma emission spectrum of cobalt-60
  • The total absorption coefficient of aluminium (atomic number 13) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. As is usual, the photoelectric effect is largest at low energies, Compton scattering dominates at intermediate energies, and pair production dominates at high energies.
  • Alpha radiation]] consists of [[helium]] nuclei and is readily stopped by a sheet of paper. [[Beta radiation]], consisting of [[electron]]s or [[positron]]s, is stopped by an aluminium plate, but gamma radiation requires shielding by dense material such as lead or concrete.
  • The red dots show some of the ~500 terrestrial gamma-ray flashes daily detected by the Fermi Gamma-ray Space Telescope through 2010. Credit: NASA/Goddard Space Flight Center.
  • 60}}
  • NASA guide to electromagnetic spectrum showing overlap of frequency between X-rays and gamma rays
  • In practice, gamma ray energies overlap with the range of X-rays, especially in the higher-frequency region referred to as "hard" X-rays. This depiction follows the older convention of distinguishing by wavelength.
  • Image of entire sky in 100 MeV or greater gamma rays as seen by the EGRET instrument aboard the [[CGRO]] spacecraft. Bright spots within the galactic plane are [[pulsar]]s while those above and below the plane are thought to be [[quasar]]s.
  • A [[hypernova]]. Artist's illustration showing the life of a [[massive star]] as [[nuclear fusion]] converts lighter elements into heavier ones. When fusion no longer generates enough pressure to counteract gravity, the star rapidly collapses to form a [[black hole]]. Theoretically, energy may be released during the collapse along the axis of rotation to form a long duration [[gamma-ray burst]].
  • access-date=2011-11-08}}</ref>
  • Fermi's]] Large Area Telescope (LAT).
  • The total absorption coefficient of lead (atomic number 82) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. Here, the photoelectric effect dominates at low energy. Above 5 MeV, pair production starts to dominate.
  • VACIS]] (vehicle and container imaging system)
ELECTROMAGNETIC RADIATION OF HIGH FREQUENCY AND THEREFORE HIGH ENERGY
Gamma-ray; Gamma radiation; Gamma Ray; Gamma decay; Gamma particle; Gamma Radiation; Γ Radaition; Gamma particles; Gamma Rays; Gamma photon; Gamma Rays and their characteristics; Gamma-Ray; Gamma-rays; Gammaray; G Radaition; Gamma Ray Control; Gamma rays; Secondary radiation; Gamma-decay; Γ-ray; Γ-rays; Γ radiation; Gamma-ray source; Gamma-ray production; Gamma ray generation; Gamma ray production; Gamma-ray generation; Gamma emission; Γ ray; Y photons; Γ rays; Gamma-irradidated; Gamma-irradiated
A gamma ray, also known as gamma radiation (symbol γ or \gamma), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays.

Википедия

Gamma

Gamma (uppercase Γ, lowercase γ; Greek: γάμμα gámma) is the third letter of the Greek alphabet. In the system of Greek numerals it has a value of 3. In Ancient Greek, the letter gamma represented a voiced velar stop IPA: [ɡ]. In Modern Greek, this letter represents either a voiced velar fricative IPA: [ɣ] or a voiced palatal fricative IPA: [ʝ] (while /g/ in foreign words is instead commonly transcribed as γκ).

In the International Phonetic Alphabet and other modern Latin-alphabet based phonetic notations, it represents the voiced velar fricative.