Abstract
Using time-resolved pulsed absorption and luminescence spectroscopy we have studied the creation ofF 2 centers during electron pulses of nanosecond duration in the temperature range 80 to 300 K. We show that the formation ofF 2 centers in long-lived metastable states is thermally activated and competes withF 2 center relaxation to the singlet state. It is shown that the S-T crossing in the set of states which describe theFC2 center lies above the1 П u level. We propose that when the crystal is excited with the lowest energy quanta which produce a photocurrent, the formation of tripletF 2 centers takes place by localization of a conduction electron on anF +2 center.
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State Academy of Architecture and Construction, Tomsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 17–22, November, 1994.
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Lisitsyna, L.A. Metastable F2 center states in LiF crystals. Russ Phys J 37, 1024–1028 (1994). https://doi.org/10.1007/BF00559210
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DOI: https://doi.org/10.1007/BF00559210