gamma ray

American  

noun

Physics.

1. a photon of penetrating electromagnetic radiation gamma radiation emitted from an atomic nucleus.

2. a photon emitted by an electron as a result of internal conversion.

3. electromagnetic radiation with wavelengths shorter than approximately one tenth of a nanometer.

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gamma ray Scientific  

1. 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.

2. See more at radioactive decay

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Etymology

Origin of gamma ray

First recorded in 1900–05

Example Sentences

However, it could become detectable at the highest photon energies, specifically in very-high-energy gamma rays.

From Science Daily

Most of that radiation comes in the form of gamma rays and other high-energy particles that are invisible to Webb's infrared instruments.

From Science Daily

The timing was especially telling: the new outflows appeared in the images while NASA's Fermi Gamma-ray Space Telescope was also detecting high-energy gamma rays, directly connecting the shock-powered radiation to those colliding streams.

From Science Daily

Measurements show that this distant supernova closely matches the brightness and spectral features of SN 1998bw, a well known supernova linked to a gamma ray burst that exploded much closer to Earth.

From Science Daily

The newly formed CZT, a semiconductor, can detect tiny photon particles in X-rays and gamma rays with incredible precision – like a highly specialised version of the light-sensing, silicon-based image sensor in your smartphone camera.

From BBC