The influence of a microwave radiation on the prompt fluorescence (PF) excited in molecular crystals by an ultrashort laser pulse is theoretically considered in the work. Laser pulse excites organic molecule to the lowest singlet state S₁ and simultaneously produces a pair of localized triplet excitons in its singlet state. The subsequent emission from the S₁ level and emission from the singlet spin component of the triplet pair combine to produce PF. Unlike the steady-state RYDMR, the pulsed method proposed in this work allows the two emission channels to be discriminated. A microwave-induced contribution to the PF-decay curve is shown to be bell-shaped and contain oscillatory component. By measuring the amplitude of these oscillations one can estimate relationship between the partial transition rates controlling the decay process.

理论上，在工作中考虑了微波辐射对由超短激光脉冲激发的分子晶体中的即时荧光（PF）的影响。激光脉冲将有机分子激发到最低的单重态S ₁，同时产生一对处于其单重态的局部三重态激子。S ₁的后续发射三重态对的单重态自旋组分的能级和发射相结合以产生PF。与稳态RYDMR不同，这项工作中提出的脉冲方法可以区分两个发射通道。微波对PF衰变曲线的影响呈钟形，并包含振荡成分。通过测量这些振荡的幅度，可以估计控制衰减过程的部分跃迁速率之间的关系。