Gamma ray


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to Gamma ray: Gamma ray detector

Gamma ray

A high-energy photon, emitted by radioactive substances.
References in periodicals archive ?
The electromagnetic spectrum ranges from radio waves (some of which have photon energies of 10-9 eV), through visible light (a few eV), to higher-energy x-rays (10 keV and up) and gamma rays (mostly 100 keV and up).
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.
As a gamma-ray astronomer, what I have found most interesting is that nearly every object discovered in gamma rays has been unexpected.
The recoil is then vanishingly slight, and the gamma ray wavelength shows no spread due to that recoil.
gamma]] cos[theta]), where [theta] is the angle between the neutron spin and the direction of emission of the gamma ray.
Fermi's Large Area Telescope (LAT) recorded one gamma ray with an energy of at least 94 billion electron volts (GeV), or some 35 billion times the energy of visible light, and about three times greater than the LAT's previous record.