TERMIUM Plus®

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RADIOACTIVE DECAY LAW [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2009-11-09

English

Subject field(s)
  • Nuclear Physics
  • Atomic Physics
CONT

The law of radioactive decay predicts how the number of the not decayed nuclei of a given radioactive substance decreases in the course of time.

OBS

The red circles of this simulation symbolize 1000 atomic nuclei of a radioactive substance whose half-life period (T) amounts to 20 seconds.

Key term(s)
  • radioactive decay law

French

Domaine(s)
  • Physique nucléaire
  • Physique atomique
CONT

Loi de décroissance radioactive. C'est en 1902 que Rutherford et Soddy ont mis en évidence la loi de décroissance exponentielle d'un corps radioactif. En effet, ils cherchaient à interpréter leurs expériences réalisées sur les éléments appartenant à la famille radioactive du thorium. C'est à Bateman (en 1910) que l'on doit l'établissement du formalisme général de résolution des équations régissant les filiations radioactives en fonction du temps [...]

Spanish

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Record 2 - external organization data 1994-11-16

English

Subject field(s)
  • Radiological Physics (Theory and Application)
  • Compartment - Canadian Nuclear Safety Commission

French

Domaine(s)
  • Physique radiologique et applications
  • Tiroir - Commission canadienne de sûreté nucléaire

Spanish

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Record 3 1994-07-28

English

Subject field(s)
  • Mathematics
  • Computer Graphics
CONT

Mirror symmetry, that is, invariance against "flipping sides", is perhaps the most widely noticed symmetry. Nature built many of her organisms in nearly symmetric ways, and most fundamental laws of physics, such as Newton's law of gravitation, have an exact mirror symmetry : there is no difference between left and right in the attraction of heavenly(and most earthbound) bodies. However, the nonconservation of parity in radioactive decay-that is, the violation of point symmetry in the "weak" interactions-has finally taught even the physicists to take the distinction between right and left seriously.

French

Domaine(s)
  • Mathématiques
  • Infographie
DEF

[...] symétrie signifiant que le corps est divisé en deux parties, chacune image de l'autre dans un miroir. C'est la notion courante de symétrie bilatérale.

Spanish

Save record 3

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