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Effect of coherence of rotational motions on nuclear magnetic relaxation

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Il Nuovo Cimento (1955-1965)

Summary

The nuclear magnetic relaxation due to reorientational motions of molecules with two antiparallel equilibrium positions is reconsidered. The associated correlation function is generalized in order to make it independent from the initial state of the system. A simple expression, which differs from the B.P.P. one in a factor due to the presence of a certain amount of coherence in the motion, is found for (T 1)intra in the case of narrowing motion. The conditions under which an effect of coherence can influence the value of (T 1)intraare discussed.

Riassunto

Si rioonsidera il rilassamento magnetico nucleare dovuto a moti di riorientazione di moleoole aventi due posizioni di equilibrio. La funzione di correlazione associate viene generalizzata in modo da renderla indipendente dallo stato iniziale del sistema. Viene rioavata, per il caso di «narrowing» motion, una espressione per (T 1)intra che differisce da quella di B.P.P. per un fattore legato alia presenza di coerenza nel moto. Vengono discusse le condizioni sotto le quali un effetto di coerenza può influire sul valore di (T 1) intra.

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Authors and Affiliations

  1. Istituto di Fisiea dell’Université, Pavia

    B. De Micheli & L. Giulotto

Authors
  1. B. De Micheli
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  2. L. Giulotto
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De Micheli, B., Giulotto, L. Effect of coherence of rotational motions on nuclear magnetic relaxation. Nuovo Cim 37, 726–738 (1965). https://doi.org/10.1007/BF02749868

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  • DOI: https://doi.org/10.1007/BF02749868

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