L'inhomogénéité du champ radiofréquence en résonance magnétique nucléaire : expériences et simulations

Abstract : This work deals with the use of radiofrequency field inhomogeneity in nuclear magnetic resonance (NMR). In a first chapter, we present a software for generating and simulating NMR pulse sequences, taking in account the various inhomogeneity types. These simulations were used to design experiments aimed at the determination of CSA-dipolar cross-correlation rate. The second chapter deals with the design of new procedures to select a thin slice of a sample and based on natural radiofrequency field inhomogeneity. We used these procedures, along with a vertical sample displacement, to observe the evolution of the NMR spectrum in a heterogeneous sample. In the third chapter, we present a new method for measuring self-diffusion coefficients based on slice selection procedures. This method was successfully tested on various compounds.
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Sébastien Leclerc. L'inhomogénéité du champ radiofréquence en résonance magnétique nucléaire : expériences et simulations. Autre. Université Henri Poincaré - Nancy 1, 2004. Français. ⟨NNT : 2004NAN10038⟩. ⟨tel-01754379⟩

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