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