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COSMIC RAYS [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2011-10-27

English

Subject field(s)
  • Astrophysics and Cosmography
  • Nuclear Physics
  • Compartment - Canadian Nuclear Safety Commission
DEF

High-energy atomic particles that travel through space at speeds close to the speed of light ...

CONT

Cosmic rays consist of neutrons, protons, gamma radiation and other fundamental particles which emanate from the sun and outer space and impinge on the earth. Their effect is greatest at high altitude and towards the poles.

CONT

... a rain of fast ions constantly bombarding Earth, coming from distant space and much more energetic than any found in the magnetosphere. They are known as cosmic rays or cosmic radiation.

PHR

Cosmic ray meter.

Key term(s)
  • cosmic ray
  • cosmic ray particles
  • cosmic-ray particle
  • cosmic ray particle

French

Domaine(s)
  • Astrophysique et cosmographie
  • Physique nucléaire
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Ensemble de particules (électrons, hypérons, mésons, neutrons, nucléons, photons [gamma]) parvenant, à travers l'atmosphère, à la surface de la Terre, animées de grandes vitesses.

CONT

[...] notre Terre est irradiée en permanence par des rayons provenant de l'espace interstellaire de notre galaxie qu'on appelle rayons cosmiques. Ces derniers provoquent chez l'homme une irradiation annuelle de 0,35 mSv [millisieverts] au niveau de la mer [...]

OBS

On distingue [...] le rayonnement primaire [et] le rayonnement secondaire [...]

OBS

Bien qu'on emploie souvent indifféremment les expressions rayons cosmiques solaires, galactiques et extragalactiques (solar, galactic, extragalactic cosmic rays, en anglais), il s'agit bien de notions différentes.

OBS

Ne pas confondre cette notion avec celle de rayonnement extraterrestre.

OBS

Ne pas confondre «rayonnement» et «radiation», la radiation étant l'action d'émettre le rayonnement.

Key term(s)
  • rayon cosmique

Spanish

Campo(s) temático(s)
  • Astrofísica y cosmografía
  • Física nuclear
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
DEF

Radiaciones corpusculares que provienen principalmente de la galaxia y también del Sol, cuya gama de energía es de aproximadamente 108 a 1020 EV.

OBS

Se detectan por la emisión de partículas elementales producidas por el choque con las moléculas y átomos de la atmósfera terrestre.

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