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OVERHAUSER EFFECT [1 record]
Record 1 - internal organization data 2011-06-07
Record 1, English
Record 1, Subject field(s)
- Electromagnetic Radiation
Record 1, Main entry term, English
- Overhauser effect
1, record 1, English, Overhauser%20effect
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The effect whereby, if a radio frequency field is applied to a substance in an external magnetic field, whose nuclei have spin ½ and which has unpaired electrons, at the electron spin resonance frequency, the resulting polarization of the nuclei is as great as if the nuclei had the much larger electron magnetic moment. 1, record 1, English, - Overhauser%20effect
Record 1, French
Record 1, Domaine(s)
- Rayonnements électromagnétiques
Record 1, Main entry term, French
- effet Overhauser
1, record 1, French, effet%20Overhauser
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- relaxation dipolaire croisée 2, record 1, French, relaxation%20dipolaire%20crois%C3%A9e
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Effet conduisant à une polarisation dynamique des spins nucléaires, observé dans un métal ou un semi-conducteur soumis à un champ magnétique, lorsque la polarisation des spins électroniques est détruite par application d’un champ hyperfréquence. 3, record 1, French, - effet%20Overhauser
Record number: 1, Textual support number: 1 CONT
Considérons deux spins homonucléaires proches dans l’espace, chacun d’eux exerce sur l’autre un champ magnétique local. Ce phénomène est plus spécifiquement appelé relaxation dipolaire croisée ou effet Overhauser. Le système de spins est décrit par quatre niveaux d’énergie. 4, record 1, French, - effet%20Overhauser
Record number: 1, Textual support number: 1 OBS
L’effet se traduit par l’apparition d’une polarisation nucléaire importante due au couplage entre spins électroniques et spins nucléaires. 3, record 1, French, - effet%20Overhauser
Record number: 1, Textual support number: 2 OBS
La relaxation dipolaire croisée est à l’origine du NOE [effet Overhauser nucléaire]. 5, record 1, French, - effet%20Overhauser
Record 1, Spanish
Record 1, Textual support, Spanish
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