Kinetics of Prompt Fluorescence Excited by a Laser Pulse in a Molecular Crystal in a Microwave Field

Abstract

The pulsed version of the reaction yield detected magnetic resonance (RYDMR) method is theoretically considered for the reaction scheme according to which the annihilation of triplet excitons in a molecular crystal occurs. Analytical expressions are obtained that describe the kinetics of prompt fluorescence decay with time under the conditions of its excitation by an ultrashort laser pulse. The corresponding shape of the decay curves of prompt fluorescence is determined. It is shown that the obtained curves can be used for a more detailed determination of the reaction rate constants than in the case of the stationary version of the RYDMR method.