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POLYNOMIAL LEGENDRE [2 records]
Record 1 - internal organization data 2011-06-08
Record 1, English
Record 1, Subject field(s)
- Scientific Measurements and Analyses
- Electromagnetic Radiation
- Physics of Solids
Record 1, Main entry term, English
- magic angle
1, record 1, English, magic%20angle
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The magic angle is a precisely defined angle, the value of which is approximately 54. 7°. The magic angle is a root of a second-order Legendre polynomial,... and so any interaction which depends on this second-order Legendre polynomial vanishes at the magic angle. This property makes the magic angle of particular importance in solid-state NMR [nuclear magnetic resonance] spectroscopy. 1, record 1, English, - magic%20angle
Record number: 1, Textual support number: 1 OBS
magic angle: term used in the field of nuclear magnetic resonance spectroscopy. 2, record 1, English, - magic%20angle
Record 1, French
Record 1, Domaine(s)
- Mesures et analyse (Sciences)
- Rayonnements électromagnétiques
- Physique des solides
Record 1, Main entry term, French
- angle magique
1, record 1, French, angle%20magique
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Contrairement à d’autres méthodes spectroscopiques, la RMN [résonance magnétique nucléaire] possède la particularité de sonder l’environnement local d’un noyau choisi à travers la caractérisation des interactions influençant la relaxation. [...] La RMN des solides n’en est pas encore à ce niveau de haute résolution, sauf en technique HRMAS [expériences haute résolution à l'angle magique] pour les échantillons dits «mous» comme les résines gels, plantes […] En effet la rigidité du réseau cristallin accentue fortement l’influence sur la relaxation d’interactions d’origines diverses. De plus les études se font principalement sur des échantillons de poudre puisqu’il est difficile d’obtenir des monocristaux de taille suffisante (>1 mm³). Ainsi le caractère anisotrope des interactions et la présence de cristalittes aux orientations multiples génèrent des élargissements de raies de résonance. La technique la plus souvent utilisée pour éliminer, ou tout au moins réduire ces élargissements consiste à mettre l’échantillon en rotation à l’angle magique (angle de 54,7° par rapport au champ magnétique statique). 2, record 1, French, - angle%20magique
Record number: 1, Textual support number: 1 OBS
angle magique : terme utilisé en spectroscopie de résonance magnétique nucléaire. 3, record 1, French, - angle%20magique
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1981-08-18
Record 2, English
Record 2, Subject field(s)
- Mathematics
Record 2, Main entry term, English
- polynomial of Legendre 1, record 2, English, polynomial%20of%20Legendre
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, French
Record 2, Domaine(s)
- Mathématiques
Record 2, Main entry term, French
- polynôme de Legendre 1, record 2, French, polyn%C3%B4me%20de%20Legendre
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record 2, Spanish
Record 2, Textual support, Spanish
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