TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

GAMMA DISTRIBUTION [7 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 2012-01-30

English

Subject field(s)
  • Radiography (Medicine)
DEF

The process of producing a scintigram.

CONT

In isotope scanning, radioactive isotopes are introduced into the body and their distribution is then determined by observations of their radioaction.... [The] isotopes... are usually emitters of gamma rays only.... The radiation emitted is detected by a scintillation counter, which is moved to and fro over the organ... being scanned; these messages can then be electronically recorded as marks on paper or as a photographic image.

OBS

A radioisotope is a specific type of radioactive substance; a radioisotope is a radioactive isotope of an element. Its unstable atomic nucleus undergoes radioactive decay and emits alpha, beta or gamma rays. Most isotopes however are emitters of gamma rays only. Since a radioisotope is a specific type of radioactive substance, radioisotope scanning is specific with respect to radioactive scanning (in French, scintigraphie).

French

Domaine(s)
  • Radiographie (Médecine)
DEF

Radiographie consistant à injecter, généralement par voie intraveineuse, une solution radioactive qui a une affinité élective pour l'organe examiné, puis à déterminer, à l'aide d'un détecteur placé à l'extérieur, la répartition topographique de la radioactivité dans les différentes parties de l'organe.

Key term(s)
  • radioisotopie
  • radiologie isotopique

Spanish

Save record 2

Record 3 2011-02-10

English

Subject field(s)
  • Nuclear Waste Materials
  • Waste Management
CONT

Gamma irradiating packages. Some packages generated by COGEMA at the La Hague fuel reprocessing plant contain radioactive waste with significant gamma radiation levels... [Modifications] primarily consisted of using an offset cab for the disposal operator, and controlling the distribution of irradiating packages in the structure.

French

Domaine(s)
  • Déchets nucléaires
  • Gestion des déchets
CONT

Le transport de colis irradiants nécessite la gestion du risque radiolyse : il s'agit en particulier de limiter les concentrations en hydrogène moléculaire provenant soit de la destruction de l'eau adsorbée dans le colis, soit de l'irradiation de matériaux organiques.

Spanish

Save record 3

Record 4 1999-08-31

English

Subject field(s)
  • Statistical Surveys
  • Operations Research and Management
DEF

The probability distribution of a continuous random variable X which can take any value from 0 to ...

Key term(s)
  • Pearson distribution

French

Domaine(s)
  • Sondages et enquêtes (Statistique)
  • Recherche et gestion opérationnelles
DEF

Loi de probabilité d'une variable aléatoire continue X, pouvant prendre toute valeur de 0 à (...)

Key term(s)
  • distribution de Pearson

Spanish

Save record 4

Record 5 1986-05-05

English

Subject field(s)
  • Statistics
  • Atmospheric Physics
CONT

The Weibull distribution is a special case of the generalized gamma distribution.

French

Domaine(s)
  • Statistique
  • Physique de l'atmosphère

Spanish

Save record 5

Record 6 1980-11-17

English

Subject field(s)
  • Econometrics

French

Domaine(s)
  • Économétrie

Spanish

Save record 6

Record 7 1977-03-15

English

Subject field(s)
  • Statistics
  • Mathematics
  • Hydrology and Hydrography
OBS

Another frequency curve that has proved useful in analyses of hydrologic data, particularly drought frequencies and low flow data, is the incomplete gamma distribution. This distribution, which originates out of a Pearson type III curve, passes through the origin(...)

French

Domaine(s)
  • Statistique
  • Mathématiques
  • Hydrologie et hydrographie
OBS

La distribution gamma incomplète est une autre courbe de fréquence qui s'est avérée fort utile dans l'analyse des données hydrologiques, en particulier des fréquences de périodes de sécheresse et des données de débit d'étiage. Cette distribution provient de la courbe III de Pearson qui passe par l'origine; (...)

Spanish

Save record 7

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