Well, maybe it was a gamma-ray burst, or maybe it was something else, cautioned some others.
Meanwhile they amused themselves occasionally by planting a gamma-ray bomb in each of Mars' major cities.
The figure on the next page shows the gamma-ray spectrum for the patient.
A source of neutrons to activate the material and a gamma-ray spectrometer to measure the radiation from the material afterwards.
gamma-ray spectra are collected all day, first from a sample, then from its accompanying standard.
Then you place each card, in turn, on a holder close to the gamma-ray detector for a period of 10 minutes.
Somewhere in Cairo there must be a company that used X-ray or gamma-ray photography to check large castings.
The two gamma-ray spectra you obtain look like those in the figure on the opposite page.
gamma ray n.
Electromagnetic radiation emitted from the nucleus of an atom by radioactive decay and having energies in a range from ten thousand (104) to ten million (107) electron volts.
|gamma ray |
A stream of high-energy electromagnetic radiation given off by an atomic nucleus undergoing radioactive decay. Because the wavelengths of gamma rays are shorter than those of x-rays, gamma rays have greater energy and penetrating power than x-rays. Gamma rays are emitted by pulsars, quasars, and radio galaxies but cannot penetrate the Earth's atmosphere. See more at radioactive decay.