NATURE OF EMISSION BANDS OF SELF-TRAPPED EXCITONS IN SOLID XENON

The paper presents the analysis of experimental data on the temperature dependence of luminescence spectra of solid xenon. The mechanisms of exciton self-trapping down to quasi-molecular states under different conditions are discussed. A new treatment of spectral distribution of intensity through quasi-molecular luminescence bands is proposed; according to the treatment, at T < 55 K the emission is associated with the transition from the lowest vibrational relaxation excited state 3Σu+, while at T 60 K from the term 1Σu+. Spectral redistribution of intensities in the 60-150 K range is due to an increase in the rate of vibrational relaxation in the state 1Σu+ with increasing the crystal temperature. © 1979.