gamma ray lines

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• Gamma ray burst progenitors — are the types of celestial objects that can emit gamma ray bursts (GRBs). GRBs show an extraordinary degree of diversity. They can last anywhere from a fraction of a second to many minutes. Bursts could have a single profile or oscillate wildly… …   Wikipedia

• Gamma ray — Gamma rays (denoted as gamma;) are a form of electromagnetic radiation or light emission of frequencies produced by sub atomic particle interactions, such as electron positron annihilation or radioactive decay. Gamma rays are generally… …   Wikipedia

• Gamma ray spectrometer — A Gamma Ray Spectrometer, or (GRS), is an instrument for measuring the distribution (or spectrum see figure) of the intensity of gamma radiation versus the energy of each photon. Gamma rays are electromagnetic radiation at the short wavelength,… …   Wikipedia

• Terrestrial gamma-ray flash — Terrestrial gamma ray flashes (TGFs) are bursts of gamma rays in the earth s atmosphere. TGFs have been recorded to last 0.2 to 3.5 milliseconds, and have energies of up to 20 MeV. They are probably caused by electric fields produced above… …   Wikipedia

• Compton 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… …   Universalium

• Gamma spectroscopy — The gamma ray spectrum of natural uranium, showing about a dozen discrete lines superimposed on a smooth continuum, allows the identification the nuclides 226Ra, 214Pb, and 214Bi of the uranium decay chain. Gamma ray spectroscopy is the… …   Wikipedia

• ray — ray1 raylike, adj. /ray/, n. 1. a narrow beam of light. 2. a gleam or slight manifestation: a ray of hope. 3. a raylike line or stretch of something. 4. light or radiance. 5. a line of sight. 6. Physics, Optics. a …   Universalium

• ray — I [[t]reɪ[/t]] n. 1) a narrow beam of light 2) a slight manifestation: a ray of hope[/ex] 3) radiance 4) opt phs opt a) any of the lines or streams in which light appears to radiate from a luminous body b) the straight line normal to the wave… …   From formal English to slang

• Gamma Cassiopeiae — Starbox begin name=Gamma Cassiopeiae Starbox observe epoch=J2000 ra=00h 56m 42.5s dec=+60° 43 prime; 00 Prime; appmag v=2.15 constell=Cassiopeia Starbox character class=B0.5 IVe b v= 0.15 u b= 1.08 variable=Gamma Cas Starbox astrometry radial v=… …   Wikipedia

• ray — 1. n. & v. n. 1 a single line or narrow beam of light from a small or distant source. 2 a straight line in which radiation travels to a given point. 3 (in pl.) radiation of a specified type (gamma rays; X rays). 4 a trace or beginning of an… …   Useful english dictionary

• ray — 1. A beam of light, heat, or other form of radiation. The rays from radium and other radioactive substances are produced by a spontaneous disintegration of the atom; they are electrically charged particles or electromagnetic waves of extremely… …   Medical dictionary