Stationary and Time-Resolved Hot Luminescence of Self-Trapped Excitons in Rare Gas Crystals

Experimental (Xe, Kr) and theoretical (Xe) hot luminescence (HL) data are presented for the atomic cryocrystals Xe and Kr. The experimental spectra were registered under two-photon excimer laser (ArF and KrF) excitation. The theoretical treatment was based on a new nonperturbative quantum-mechanical relaxation theory, which predicts sharp acceleration of the decay rate around a characteristic “critical” vibrational level of a strong local mode. The time-resolved HL spectra were calculated for the quasi-molecules Xe*2 in solid Xe, taking account of all bound-bound and bound-free transitions in the centre.