TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
TRANSITION PROPORTIONNELLE [2 records]
Record 1 - internal organization data 2010-03-02
Record 1, English
Record 1, Subject field(s)
- Atomic Physics
- Chemistry
Record 1, Main entry term, English
- self-absorption
1, record 1, English, self%2Dabsorption
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The absorption of radiation by the emitter. 2, record 1, English, - self%2Dabsorption
Record number: 1, Textual support number: 2 DEF
Absorption of a photon by a particle in the ground state or an excited state resulting in a transition to a higher energy state. 3, record 1, English, - self%2Dabsorption
Record number: 1, Textual support number: 1 OBS
A molecule at room temperature normally resides in the ground state. The ground state is usually a singlet state ... with all electrons paired. Electrons that occupy the same molecular orbital must be "paired", that is, have opposite spins. In a singlet state, the electrons are paired. If electrons have the same spin, they are "unpaired" and the molecule is in a triplet state. Singlet and triplet states refer to the multiplicity of the molecule. ... The spacing of the vibrational levels and rotational levels in these higher electronic states gives rise to the absorption spectrum of the molecule. 4, record 1, English, - self%2Dabsorption
Record 1, French
Record 1, Domaine(s)
- Physique atomique
- Chimie
Record 1, Main entry term, French
- auto-absorption
1, record 1, French, auto%2Dabsorption
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Absorption d’un rayonnement par l’émetteur lui-même. 2, record 1, French, - auto%2Dabsorption
Record number: 1, Textual support number: 2 DEF
Un processus par lequel une particule dans son état fondamental ou dans un état excité peut subir une transition vers un niveau d’énergie plus élevé, par l'absorption d’un photon. Pour une particule donnée, dans un état inférieur de probabilité par seconde d’une telle transition dans un champ avec un spectre continu, elle est proportionnelle à la densité de l'énergie spectrale radiante de la raie d’absorption. La constante de proportionnalité se nomme probabilité de transition d’une absorption. 3, record 1, French, - auto%2Dabsorption
Record number: 1, Textual support number: 1 OBS
La probabilité de transition d’une émission stimulée est définie d’une façon semblable pour le processus inverse de désexcitation radiative induite par le même champ de rayonnement. 3, record 1, French, - auto%2Dabsorption
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1989-12-19
Record 2, English
Record 2, Subject field(s)
- Biological Sciences
Record 2, Main entry term, English
- transition state
1, record 2, English, transition%20state
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
When molecules A and B react to give a product A-B, the reaction passes through a transition state A-B in which chemical bonds are being made and broken. The transition state is the most unstable species on the reaction pathway, and catalysis is achieved by stabilizing this state. 1, record 2, English, - transition%20state
Record 2, French
Record 2, Domaine(s)
- Sciences biologiques
Record 2, Main entry term, French
- état de transition
1, record 2, French, %C3%A9tat%20de%20transition
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Une réaction chimique telle que A-> P se produit lorsqu'une certaine proportion de la population des molécules A possède à un certain moment suffisamment d’énergie pour atteindre un état activé, appelé état de transition, où la probabilité de créer ou de détruire une liaison chimique pour former le produit P est très grande. Cet état de transition et au sommet de la barrière énergétique séparant les réactifs des produits. La vitesse d’une réaction chimique déterminée est proportionnelle à la concentration des molécules ayant atteint cet état de transition. 1, record 2, French, - %C3%A9tat%20de%20transition
Record 2, Spanish
Record 2, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: