Study of dynamical behaviour of H2O/D2O mixtures by NMR relaxation

Title: Study of dynamical behavior of H2O/D2O mixtures by NMR relaxation Author: Petr Dvořák Department: Department of Low Temperature Physics Supervisor: doc. RNDr. Jan Lang, Ph.D., Department of Low Temperature Physics Abstract: The subject of this diploma thesis is the chemical exchange in the mixture of light and heavy water, which was studied by methods of high resolution NMR. The first part of this thesis concerns methodology of sample preparation and methodology of measurement of relaxation times of mixture of light and heavy wa- ter. Experimental complications with elution of ions from tube glass, degassing of samples, radiation damping and sample heating by radio-frequency pulses were solved there. In the second part of this thesis the relaxation parameters of chemical exchange of selected sample at various temperatures were measured. Interpretations of experimental data (ionization, molecular clusters and isotopic equilibrium) was suggested. Keywords: NMR, relaxation, water, dynamics, chemical exchang