NMR experiments on light irradiation of liquids containing oxygen are described. The NMR frequency shifts when a small portion of the volume of the object is illuminated are measured. The shifts are attributed to local variation of the magnetic susceptibility that arises in the course of local variation of the concentration of dissolved oxygen and local variation of the temperature in the illuminated portion of the volume of the object. A study of the relation between the longitudinal relaxation time of chloroform protons and ultraviolet light irradiation time makes it possible to estimate the lifetime of particles that react with oxygen.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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