Quantum-chemical simulation of Frenkel pairs separation in a LiF crystal

Semiempirical quantum-chemical (INDO) simulation of the creation of the primary Frenkel pairs of defects in a LiF crystal based on the Pooley-Smoluchowski mechanism of the self-trapped exciton annihilation has been undertaken. The conclusion has been drawn that this mechanism can be operative from the viewpoints of both the time and the energy needed to create the F, H pair in terms of this mechanism. Unlike the Toyozawa's model an initial vibrational excitation is not bottleneck of the decay process (cf. 8]).