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GAMMA SPECTROSCOPY [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-06-26

English

Subject field(s)
  • Scientific Instruments
  • Electromagnetic Radiation
  • Remote Sensing
  • Cartography
DEF

An instrument for determining the energy distribution of gamma rays.

CONT

Gamma rays are electromagnetic radiation at the short-wavelength, or high-frequency, end of the electromagnetic(EM) spectrum, which ranges from gamma rays(short) to radio(long). The study and analysis of gamma-ray spectra for scientific and technical use is called gamma spectroscopy, and gamma-ray spectrometers are the instruments which observe and collect such data. Because the energy of each photon of EM radiation is proportional to its frequency, gamma rays have sufficient energy that they are typically observed by counting individual photons.

OBS

The gamma-ray spectrometer is used for detecting iron, magnesium titanium, thorium and potassium. It is also used for identifying samples of unknown composition.

OBS

gamma ray spectrometer: term standardized by the International Electrotechnical Commission (IEC).

French

Domaine(s)
  • Instruments scientifiques
  • Rayonnements électromagnétiques
  • Télédétection
  • Cartographie
DEF

Appareil qui permet de déterminer le spectre d'énergie des rayons gamma.

CONT

Les spectromètres à rayons gamma actuels permettent de donner une analyse précise [...] et rapide de la concentration en uranium, thorium et potassium dans les roches ou les sols. [...] Les spectromètres à rayons gamma fonctionnent sur le même principe que le scintillomètre à l'exception qu'ils utilisent les caractéristiques relatives à l'intensité ou l'énergie spécifique des rayons gamma des isotopes radioactifs.

OBS

spectromètre gamma : terme normalisé par la Commission électrotechnique internationale (CEI).

Spanish

Campo(s) temático(s)
  • Instrumentos científicos
  • Radiación electromagnética
  • Teledetección
  • Cartografía
Save record 1

Record 2 2013-06-26

English

Subject field(s)
  • Remote Sensing
CONT

Most radioactive sources produce gamma rays of various energies and intensities. When these emissions are collected and analyzed with a gamma-ray spectroscopy system, a gamma-ray energy spectrum can be produced.

French

Domaine(s)
  • Télédétection

Spanish

Save record 2

Record 3 2005-03-08

English

Subject field(s)
  • Analytical Chemistry
  • Atomic Physics
  • Geological Research and Exploration
  • Geological Prospecting
DEF

An analytical technique involving the use of gamma radiation, which is emitted from radioactive nuclei in discrete energies.

CONT

For those deposits ... in which potassic alteration is important, gamma-ray spectrometry has proven to be a useful tool for mapping hydrothermal alteration.

OBS

The spectrum of energies and the relative intensities of the gamma rays often characterize the radio-nuclide that emits them; it is these that are determined by gamma ray spectroscopy. It is possible to identify quantitatively the elements present by their characteristic gamma ray spectra as well as to determine radioactive decay rates.

PHR

Airborne gamma-ray spectrometry.

French

Domaine(s)
  • Chimie analytique
  • Physique atomique
  • Recherches et prospections géologiques
  • Prospection géologique
CONT

Dans le cas des gîtes [...] où l'altération potassique est importante, la spectrométrie gamma pourrait s'avérer un bon outil pour cartographier la configuration de l'altération hydrothermale.

PHR

Spectrométrie gamma aérienne.

Spanish

Save record 3

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