gamma rays


Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.
Related to gamma rays: Cosmic rays, electromagnetic spectrum

gamma

 [gam´ah]
the third letter of the Greek alphabet, γ, used in names of chemical compounds to distinguish one of three or more isomers or to indicate the position of substituting atoms or groups.
gamma chain disease a type of heavy chain disease that resembles a malignant lymphoma, with symptoms of lymphadenopathy, hepatosplenomegaly, and recurrent infections.
gamma globulin
1. a class of plasma proteins composed almost entirely of immunoglobulins, the proteins that function as antibodies. Production of gamma globulin may be increased in the body when there is invasion by harmful microorganisms. An abnormal amount in the blood, a condition known as hypergammaglobulinemia, may be indicative of a chronic infection or certain malignant blood diseases. There is also a rare condition, agammaglobulinemia, in which the body is unable to produce gamma globulin; patients suffering from this are extremely susceptible to infection and must be given frequent injections of gamma globulin serum.
gamma rays (γ-rays) electromagnetic emissions from radioactive substances; they are similar to and have the same general properties as x-rays but are produced through the disintegration of certain radioactive elements. They consist of high energy photons, have short wavelengths, and have no mass and no electric charge. Gamma rays are sometimes used in the treatment of deep-seated malignancies (see radiation therapy).

gam·ma rays

electromagnetic radiation emitted from radioactive substances; they are high-energy x-rays but originate from the nucleus rather than the orbital shell and are not deflected by a magnet.

gam·ma rays

(gamă rāz)
Electromagnetic radiation emitted from radioactive substances; they are high-energy x-rays but originate from the nucleus rather than the orbital shell and are not deflected by a magnet.

Gamma rays

Short wavelength, high energy electromagnetic radiation emitted by radioactive substances.
Mentioned in: Radiation Therapy

gam·ma rays

(gamă rāz)
Electromagnetic radiation emitted from radioactive substances; high-energy x-rays that originate from the nucleus rather than the orbital shell and are not deflected by a magnet.
References in periodicals archive ?
Until recently, attempts to detect galactic center pulsars in large enough numbers to explain the extra gamma rays have failed.
Most of the gamma rays detected by the Fermi satellite originates from within the Milky Way, and are produced from pulsars - which are rotating neutron stars - and supernovae.
8) Unlike gamma rays, neutrons do not have a characteristic energy spectrum by which an isotope can be identified.
Electron beam, X-ray and gamma ray food irradiation facilities are all multimillion-dollar propositions.
The ability to detect gamma ray passage through fatty tissue has biomedical applications in the diagnosis of metastatic breast cancer.
Then came CGRO, equipped with four sensitive instruments to observe and measure gamma rays.
Despite their cancer-causing properties, gamma rays are also used to treat some types of cancer, since the rays kill cancer cells also.
Two teams have now made the first definitive detection of high-energy gamma rays from this system, a microquasar known as Cygnus X-3.
As chunks of material collide, they produce gamma rays.
2 MeV gamma rays from the capture reaction are detected in an array of CsI(Tl) scintillators read out by vacuum photodiodes operated in current mode.
government detectors recorded bursts of gamma rays from outside the Solar System.