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SPIN SPIN RELAXATION [1 record]
Record 1 - internal organization data 2012-01-09
Record 1, English
Record 1, Subject field(s)
- Electromagnetic Radiation
Record 1, Main entry term, English
- spin-spin relaxation
1, record 1, English, spin%2Dspin%20relaxation
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- transverse relaxation 2, record 1, English, %20%20transverse%20relaxation
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
Magnetic relaxation, observed after application of weak magnetic fields, in which the excess potential energy associated with electron spins in a magnetic field is redistributed among the spins, resulting in heating of the spin system. 3, record 1, English, - spin%2Dspin%20relaxation
Record 1, Key term(s)
- spin spin relaxation
Record 1, French
Record 1, Domaine(s)
- Rayonnements électromagnétiques
Record 1, Main entry term, French
- relaxation spin-spin
1, record 1, French, relaxation%20spin%2Dspin
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- relaxation transversale 1, record 1, French, relaxation%20transversale
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
En RMN [résonance magnétique nucléaire] classique, tous les noyaux devraient résonner pour un couple déterminé (Bo, B1 : fréquence de radiation utilisée). Dans la réalité il faut tenir compte du phénomène de relaxation. En effet, après absorption de la radiation, le noyau a tendance à revenir à l'équilibre. On distingue deux sortes de relaxations : Relaxation spin-milieu ou spin-réseau, dite relaxation longitudinale. Ce phénomène longitudinal est provoqué par les molécules qui subissent un mouvement de rotation, de vibration, de translation et par les propriétés magnétiques des noyaux. L'énergie de translation est transférée au réseau du milieu. Relaxation spin-spin ou relaxation transversale. Cette relaxation est due à l'échange mutuel de spins entre les noyaux voisins, ce qui provoque un champ induisant la transition. 2, record 1, French, - relaxation%20spin%2Dspin
Record 1, Key term(s)
- relaxation spin spin
Record 1, Spanish
Record 1, Textual support, Spanish
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