TERMIUM Plus®

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CONTACT IONIZATION [1 record]

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Alphabetical list of terms

Record 1 2001-04-26

English

Subject field(s)
  • Energy Transformation
  • Thermonuclear fusion
  • Atomic Physics
DEF

The ionization of the atoms of a gas due to contact with the surface of a metal when the work function of the metal is higher than the ionization energy of the gas atom.

OBS

contact ionization: term standardized by ISO.

French

Domaine(s)
  • Transformation de l'énergie
  • Fusion thermonucléaire
  • Physique atomique
DEF

Ionisation des atomes d'un gaz par contact avec la surface d'un métal quand le travail d'extraction de celui-ci est supérieur à l'énergie d'ionisation des atomes du gaz (effet de Langmuir positif). [Définition normalisée par l'ISO.]

OBS

S'il y a chauffage concomitant du métal jusqu'à production d'une émission thermoélectrique, les électrons émis formeront avec les ions positifs du gaz un plasma fortement ionisé mais de faible énergie.

OBS

ionisation par contact : terme normalisé par l'ISO.

Spanish

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