Abstract
A novel experimental setup to study the effect of microwave field on the kinetics of recombination fluorescence from nonpolar solutions irradiated with nanosecond X-ray pulses is described. Experiments on the observation of the microwave field effects in dodecane and hexane solutions are presented. The most favorable conditions for observation of the microwave induced quantum oscillations are found. The effect of spin locking was observed for the first time in the time-resolved microwave field effects. An efficient method to calculate the spin evolution of a radical pair in a microwave field taking into account relaxation is suggested. Analytical expressions for the microwave field effect in the limiting cases of large and small hyperfine splittings are given.
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