Abstract
The spectrum of F-center excitation by 5-to 27-eV photons in the Na6Al6Si6O24(NaI)2x sodalite optical ceramic (x=0.8) was measured at 80 K by high-sensitivity photoexcited luminescence techniques. The F-centers are created by photons with an energy of 5.6-to 8.5 eV through the excitation and ionization of iodine centers of two types; in the 8.2-to 27-eV region, through the generation of electronic excitations in the aluminosilicate framework of alternating Al3+ and Si4+ ions, each coordinated tetrahedrally by oxygen ions. At the low irradiation doses used, the F centers are created primarily through photoelectron capture by the iodine vacancies which exist before irradiation. In the 23-to 25-eV region, the efficiency of F-center formation doubles as a result of the multiplication of electron-hole pairs.
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Translated from Fizika Tverdogo Tela, Vol. 43, No. 5, 2001, pp. 798–803.
Original Russian Text Copyright © 2001 by Kudryavtseva, Liblik, A. Lushchik, Ch. Lushchik, Nagirny\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\), Vasil’chenko.
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Kudryavtseva, I., Liblik, P., Lushchik, A. et al. Color center formation by synchrotron radiation in the Na6Al6Si6O24(Nal)1.6 optical ceramic. Phys. Solid State 43, 830–835 (2001). https://doi.org/10.1134/1.1371360
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DOI: https://doi.org/10.1134/1.1371360