gamma ray


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gamma ray

[′gam·ə ‚rā]
(nuclear physics)
A high-energy photon, especially as emitted by a nucleus in a transition between two energy levels.
References in periodicals archive ?
PITTSBURGH, March 10, 2015 /PRNewswire-USNewswire/ -- A newly discovered dwarf galaxy orbiting our own Milky Way has offered up a surprise - it appears to be radiating gamma rays, according to an analysis by physicists at Carnegie Mellon, Brown and Cambridge universities.
Cobalt 60 gives off high energy photons, called gamma rays, which can penetrate foods to a depth of several feet.
It is important that the gamma rays emitted are low energy as the procedure is diagnostic and the tissue should not be damaged from the radiation exposure.
Gamma rays are the most energetic of all forms of electromagnetic radiation, but as an object emitting them cools, it radiates waves of lower energy: X-rays, ultraviolet radiation, visible light, infrared rays and, at the lowest range of the energy spectrum, radio.
gamma]] cos[theta]), where [theta] is the angle between the neutron spin and the direction of emission of the gamma ray.
When positrons (also called positive electrons) collide with ordinary, negatively charged electrons, they mutually destroy each other and spawn gamma rays that have a very specific energy: 511,000 electron volts.
Recent modeling work of dark lightning shows that it can explain many of the observed properties of terrestrial gamma ray flashes.
The discovery was reported May 1 at a meeting of the High Energy Astrophysics Division of the American Astronomical Society in San Diego, where scientists announced several new gamma ray findings.
These clouds emit gamma rays when struck by high-speed particles escaping the remnants.
Scientists using NASA's orbiting Compton Gamma Ray Observatory said the 150-minute flare turned the quasar known as PKS 1622-297 into the brightest gamma-ray source in the sky for several days last summer.
As the only security company to provide x-ray, gamma ray, and material specific neutron analysis technology, we feel confident that we can engineer the best solution possible.