Effect of temperature on F2-center formation in F2+-center charge transfer

Formation of F2-centres under electron localization within F2+-centres preliminary formed in crystal is studied using techniques of pulse luminescence and absorption spectrometry with nanosecond time resolution. (F2+ + e) system is detected to be in emitting singlet or triplet states further transitions from which result in formation of F2-centers in basic singlet state. Temperature dependences of formation efficiencies of F2-centre different spin states within 80-300 K temperature range are determined to be anticymbate ones at constant yield of total number of F2-centers formed at electron localization in F2+-centers. Formation of F2-centers in emitting singlet state dominates within 80 K range