NMR@CEMHTI

Fitting First Order Quadrupolar MAS spinning sideband patterns...

 Example :  2D MAS spectrum of Methiodine fitted to 1st order  
 Example :  23Na MAS spectrum of Sodium Nitrate NaNO3  

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Quadrupolar tensor definition :

• principal values are sorted |Vyy|<=|Vxx|<=|Vzz| note that Vxx and Vyy have signs opposite to that of Vzz - usually NMR is not sign sensitive for EFG
• Vzz+Vxx+Vyy=0
  
• etaQ is the anisotropy of the Quadrupolar tensor etaQ=Vyy-Vxx/Vzz  with 0<=EtaQ<=1
• and thus Vxx=1/2 (-EtaQ-1)Vzz  and Vyy=1/2 (EtaQ-1)Vzz

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Under construction - Construction en cours.... Old link - Ancien lien : Remarks & Comments - Remarques & commentaires : email

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