Invisible radiation with wavelength starting from about ten nanometers. A very energetic electromagnetic radiation that can penetrate even thick layers of lead.

A highly penetrating, short wavelength electromagnetic radiation emitted during the radioactive decay of many nuclides.

An electromagnetic wave of very high frequency.

1. Electromagnetic radiation emitted by the nucleus of an atom, each photon resulting from the quantum transition between two energy levels of the nucleus. 2. A term sometimes used to describe any high energy electromagnetic radiation, such as rays exceeding about 1 MeV or photons of annihilation radiation.

A type of high-energy radiation that is different from an x-ray.

an electromagnetic wave or photon emitted from the nucleus

Gamma radiation emitted during the radioactive decay of certain radioactive materials.

electromagnetic radiation of short wavelengths emitted by the nucleus of an atom during a nuclear reaction. They consist of high-energy photons, have no mass and no electric charge, travel with the speed of light, and are usually associated with beta rays.

see gamma radiation.

Region of the electromagnetic spectrum, far beyond the visible spectrum, corresponding to radiation of very high frequency and very short wavelength.

The gamma ray is: a photon of high energy, short wavelength electromagnetic nuclear radiation that is not made up matter at all…. it is pure energy. Having no mass and no charge its ionising power is very low. As its ionising power is so low it penetrates very deeply into matter before its energy has been used up. Its penetrating power is therefore very high (about 99.9% is absorbed by 1 km of air or 10 cm lead). Very few of the gamma rays emitted from the Sun reach the Earth's surface because the atmosphere is thick enough to absorb virtually all of them. For gamma ray emission to occur the nucleus must be in an excited state after emitting an alpha, beta or positron particle. Sometimes it stays like that for quite a while before the gamma ray is emitted (see metastable state), sometimes it is instantaneous. When gamma emission occurs there is no emission of matter particles therefore the nucleon number and the proton number remain the same. The remaining nucleus is of the same isotope but at a lower energy state. The following symbol is commonly in use

the highest energy, shortest wavelength electromagnetic radiation. Usually, they are thought of as any photons having energies greater than about 100 kilo electronvolt.

A form of radiation, similar to the X-ray, emitted by the nucleus of a radioactive atom.

Extremely high-energy radiation observed during large, very energetic solar flares. Gamma rays are more energetic, and have shorter wavelengths than all other types of electromagnetic radiation.

A form of radioactivity consisting of a very high-frequency form of light.

photon more energetic than an x-ray (more than about 50 k eV).

electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength

a form of high-energy radiation

a high energy photon of light, or electromagnetic radiation

a more energetic photon than those of visible light ray or X-ray

a packet of electromagnetic energy--a photon

a packet (or photon) of electromagnetic radiation emitted from the nucleus during radioactive decay and occasionally accompanying the emission of an alpha or beta particle

a photon emitted spontaneously by a radioactive substance

a photon just like the visible light photons that we are familiar with

a very energetic photon (a tiny parcel of light) -- more energetic than a visible light ray or an X-ray

a very-high-energy form of

a very high-energy X-ray, and is extremely penetrating

A type of ionizing, electromagnetic radiation that readily penetrates the body tissues of organisms.

The region of the electromagnetic spectrum defined by radiation energies above 1 million eV (or wavelengths less than 0.001 nanometers); this waveband represents the highest energy band in the electromagnetic spectrum.

A quantity of electro-magnetic energy without mass or charge emitted by a radionuclide.

short wave-length electromagnetic radiation released by some nuclear transformations. It is similar to X-ray and will penetrate through the human body. Iodine 131 emits gamma rays. Both gamma and X-rays cause ionisation.

A highly penetrating type of nuclear radiation, similar to x-radiation, except that it comes from within the nucleus of an atom, and, in general, has a shorter wavelength.

An energetic photon emitted from the nucleus during radioactive decay. The energy spectrum of gamma rays is discrete. Protection from gamma radiation requires lead or concrete shielding. Gamma radiation usually accompanies other types of decay.

High energy radiation emitted during radioactive decay.

High energy, short wavelength, electromagnetic radiation emitted by a nucleus.

The most powerful form of electromagnetic radiation. A typical gamma ray is a photon with an energy greater than 100 keV.

The form of electromagnetic radiation with the highest energy and the shortest wavelength. Any photon having an energy greater than about 100,000 electronvolts (eV). In comparison, visible light has an energy of 1.65 to 3.1 eV, and x-rays have an energy of 124 eV and upward.

Electromagnetic waves or photons emitted from the nucleus of an atom. They have no charge and are best shielded by thick layers of lead or steel. Gamma energy may cause an external or internal radiation hazard. (X-rays are similar to gamma radiation but originate from the outer shell of the atom instead of the nucleus).

Region of the electromagnetic spectrum, beyond x-rays, corresponding to radiation of very high frequency and very short wavelength. [More Info

electromagnetic radiation with energy greater than several hundred thousand electron volts.

Very penetrating electromagnetic radiation of nuclear origin. Except for origin and energy level, identical to x-rays. Electromagnetic radiation frequently accompanying alpha and beta emissions as radioactive materials decay.

a very high energy photon, more energetic than an X-ray.

This is an electromagnetic wave just like visible light. It is in the part of the spectrum which is beyond human ability to see. Gamma rays are very high energy electromagnetic waves. helium: A non-flammable gas used in balloons. Helium is the second lightest of all the gases. The lightest gas is hydrogen. Hydrogen is highly explosive when mixed with oxygen.

Short-wavelength electromagnetic radiation, similar to x-rays but of nuclear origin, with a range of wavelength from about 10-14 10-10 m.

A short wavelength, electromagnetic radiation with a range of wavelengths from 10-9 to 10-12 cm. In PET imaging, two gamma rays are emitted when an electron collides with a positron and annihilation occurs.

A type of electromagnetic radiation with a very short wavelength and high energy level. Generally, emitted during radioactive decay of a substance.

High energy electromagnetic radiation. A highly penetrating type of nuclear radiation similar to x-ray radiation, except that it comes from within the nucleus of an atom and has a higher energy. Energywise, very similar to cosmic ray except that cosmic rays originate from outer space. For more information see Electrochemistry

The highest energy (shortest wavelength) photons in the electromagnetic spectrum. Gamma rays are often defined to begin at 10 keV, although radiation from around 10 keV to several hundred keV is also referred to as hard x-rays.

Short wavelength electromagnetic radiation of nuclear origin (range of energy from 10 keV to 9 MeV) emitted from the nucleus. A gamma ray is essentially equivalent to a x-ray. Both are photons of energy—the difference being that gamma rays originate in the nucleus of the atom and x-rays originate in the extranuclear part of the atom, but x-rays are typically of lower energy.

a high energy photon emitted from the nucleus of an atom. Gamma rays are highly penetrating.

A very high energy photon with a wavelength shorter than that of X-rays.

The photons of the highest energy (the shorter wavelength) of the electromágnetico phantom. The rays gammas are often defined to begin in 10 keV, although the radiation of around 10 keV to vario hundreds keV also talks about as hard x-rays.

A log of the total natural radioactivity, measured in API units. The measurement can be made in both openhole and through casing. The depth of investigation is a few inches, so that the log normally measures the flushed zone.

Penetrating electromagnetic radiation of nuclear origin. Except for its origin and usually higher energy, it is identical to an x-ray.

Relatively short wavelength electromagnetic radiation released from the nucleus of an atom.

A discrete quantity of electromagnetic energy without mass or charge. Emitted by a radionuclide. Cf X-ray.

(Or γ-ray, γ ray, γ radiation, gamma radiation.) Electromagnetic radiation originating from transitions between energy levels of atomic nuclei. nucleus formed as a consequence of beta or alpha emission sometimes exists briefly in an excited energy level and makes a transition to a lower energy level accompanied by emission of a gamma ray photon with energy equal to the difference between the energies of the initial and final levels. Gamma ray energies from radioactive decay lie in the approximate range 10 keV–6 MeV. Gamma rays are also emitted in nuclear reactions. The boundary between x-rays and gamma rays is fuzzy, the latter term being most often used for electromagnetic radiation of nuclear origin. Boorse, H. A., and L. Motz, 1966: The World of the Atom, Vol. I, 446–448.

Gamma Ray is a power metal band from Germany, founded by former Helloween guitarist, singer and songwriter Kai Hansen.