An interpretation is made of experimental spectroscopic data acquired previously using a biharmonic pumping method in organic solvent solutions. It is shown that although consideration of the effects of the non-Markovian state of the process of oscillational relaxation essentially does not change the estimates of the time of transverse relaxation, it does determine the dispersion of the nonlinear receptivity in the field of misalignments in the pumping frequencies on the order of 10 $cm^{-1}$.
Department of General Physics and Wave Processes, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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