Gamma rays, electromagnetic

Gamma Rays. Electromagnetic radiation similar to X-rays but of shorter wave lengths. Gamma rays originate in the nucleus of an atom, whereas X-rays originate in the extra-... 

Gamma ray—Electromagnetic radiation originating from the nucleus of an atom. 

Gamma rays, electromagnetic radiation with wavelengths of 5 x 10" to 1.4... 

Gamma Decay Release of gamma rays electromagnetic radiation in the form of energy, not matter. 

Gamma rays Electromagnetic radiation of very high energy (greater than 30 keV) emitted after nuclear reactions or by a radioactive atom when its nucleus is left in an excited state after emission of alpha or beta particles. 

GAMMA-RAY Electromagnetic radiation emitted during deexcitation of the atomic nucleus. 

Gamma ray The shortest wavelength and highest energy type of all electromagnetic radiation. It originates in the nucleus of radioactive isotopes along with alpha particle, beta particle, or neutron emissions. 

Electromagnetic Telemetry. The electromagnetic telemetry is usually powered downhole with batteries. Parameters such as gamma ray, resistivity and temperature, can be transmitted while tripping up or down. Since a two-way communication is possible, the system can be switched to a logging only mode to transmit only the logging information. 

The new geosteering system offers measurements at the bit (below the mud motor) of inclination, rpm, azimuthal gamma ray, azimuthal resistivity, and bit resistivity as seen in Figure 4-298. The signals are transmitted electromagnetically to the MWD sub located above the mud motor, then relayed to surface with the standard mud pressure transmission system. To summarize, the following is recorded Just above the drill bit ... 

Gamma rays (y rays), which are high-energy, short wavelength, electromagnetic radiation particles that originate from within the nucleus... 

Gamma rays High-energy electromagnetic radiation. It is the most penetrating form of radiation that results from the decay of radioactive elements. 

Radiant Energy—The energy of electromagnetic radiation, such as radio waves, visible light, x and gamma rays. 

Gamma Ray, Penetrating—Short wavelength electromagnetic radiation of nuclear origin. 

X rays comprise that portion of the electromagnetic spectrum which lies between ultraviolet and gamma rays. The range of wavelengths is typically from about 0.01 to 100 A. Because of their very short wavelengths, X rays are powerful probes of atomic structure. 

The gamma ray is a photon of electromagnetic radiation with a very short wavelength and high energy. It is emitted from an unstable atomic nucleus and has high penetrating power. 

Interrogating the light from stars and the absorption features of atoms and molecules in-between requires some fairly complicated optics in the form of a telescope. However, the telescopes are not restricted to the parts of the electromagnetic spectrum that you can see but use radiation from microwaves to gamma rays to observe the Universe. There is too much to learn about the optics or even adaptive optics of telescopes to be discussed here but there are some properties of telescopes that we must know because they are important for the identification of atoms and molecules. We shall discuss three telescope considerations the atmosphere, the spatial resolution and the spectral resolution. 

X-rays are electromagnetic radiation lying between ultraviolet and gamma rays in the electromagnetic spectrum. The wavelength of x-rays is expressed in angstrom units (A) 1 A is equal to 10-8 cm. 

---