Linewidths in High - Resolution NMR Spectra . Homogeneous Broadening due to Intermolecular Dipolar Relaxation

The effects connected with the intermolecular relaxation in the coupled nuclear systems are studied theoretically. It was shown that, because of general properties of nuclear-spin systems, the number of parameters necessary to describe the relaxation process is reduced reduced substantially. Moreover, the structure of nuclear system and the relaxation process parameters are to a large extent separated. This fact enables one to draw quite detailed conclusions about the energy level widths even without any specification of the type of intermolecular relaxation process.