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- W1983223842 abstract "We report an experimental investigation of the electronic structure of $F$ and ${F}^{+}$ centers in electron-irradiated CaO using the spectral response and temperature dependence of photoconductivity, with associated luminescence and fluorescence lifetime measurements made on the same samples. Photoconductivity and optical-absorption measurements were made over the spectral range from 2 eV (620 nm) to 4.5 eV (275 nm). Photoconductivity and fluorescence measurements were made over the temperature range from 65 to 350 K. The photoresponse of ${F}^{+}$ centers increased sharply with increasing temperature between 210 and 300 K, where the zeroth moment, ${M}_{0}$, of the ${F}^{+}$ luminescence was decreasing with increasing temperature. Below 200 K, photoconductivity from the ${F}^{+}$ center was masked by photoconductivity from an unidentified impurity. The thermal activation energy for ${F}^{+}$-center photoconductivity was 0.24 eV. The photoresponse of $F$ centers showed no significant temperature dependence between 65 and 300 K. The $F$-center photoresponse could be optically bleached at all temperatures between 77 and 300 K and, then, fully restored by $ensuremath{gamma}$ irradiation at room temperature." @default.
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- W1983223842 date "1977-08-15" @default.
- W1983223842 modified "2023-09-24" @default.
- W1983223842 title "Photoconductivity and luminescence of electron irradiated CaO" @default.
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- W1983223842 doi "https://doi.org/10.1103/physrevb.16.1722" @default.
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