Internal photo-oxidation reduction of impurity ions in crystals: extension of an early Feofilov experiment

Donald S. McClure

doi:10.1117/12.229161

3 January 1996 Internal photo-oxidation reduction of impurity ions in crystals: extension of an early Feofilov experiment

Donald S. McClure

Author Affiliations +

Proceedings Volume 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions; (1996) https://doi.org/10.1117/12.229161
Event: Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare Earth and Transitional Ions, 1995, St. Petersburg, Russian Federation

Abstract

An electron transfer process in fluorite crystals, Eu²⁺ + Sm^3+h(nu ) yields Eu³⁺ + Sm²⁺ first studied by P. P. Feofilov, has been used to supplement photoconductivity experiments for the study of ionization and trapping. The identity of the donor and acceptor centers are positively established in the electron transfer experiment. Ratios of the cross sections for trapping by locally compensated and non-locally compensated trivalent ions in fluorite lattices were obtained. The affect of an interstitial fluoride ion on the ionization potential of Sm⁺² was measured. Evidence for trapped exciton states is reviewed here and compared to recent spectroscopic evidence for excitons trapped at Ti³⁺ in sapphire.

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Donald S. McClure "Internal photo-oxidation reduction of impurity ions in crystals: extension of an early Feofilov experiment", Proc. SPIE 2706, Tenth Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions, (3 January 1996); https://doi.org/10.1117/12.229161

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