Effect of oxygen impurity on the efficiency of the formation of complexes with H-bond and aggregation of color centers in lithium fluoride
| Autor: | S. A. Nebogin, L. I. Bryukvina, D. S. Glazunov, N. A. Ivanov |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Hydrogen bond chemistry.chemical_element Lithium fluoride 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Oxygen Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound chemistry Impurity 0103 physical sciences Molecule 0210 nano-technology Luminescence Radiation resistance |
| Zdroj: | Physics of the Solid State. 59:1139-1145 |
| ISSN: | 1090-6460 1063-7834 |
| DOI: | 10.1134/s1063783417060178 |
| Popis: | The effect of impurities on the efficiency of the formation of color centers and hydrogen-bonded molecular complexes upon exposure to various radiations in lithium fluoride crystals grown in air is studied. The results of experiments for measuring optical properties, IR vibrational spectra, luminescence, and thermally stimulated luminescence are presented. The fact that the band in the range of 1800–2300 cm–1 corresponds to stretching vibrations of a complex with strong hydrogen bond is proved based on the Fermi-resonance perturbation in the region of 2080 cm–1, shaped as the Evans hole and bands A, B, and C. It is shown that the composition of these complexes includes an OH– ion and an HF molecule. The crucial role of O2‒ V + oxygen dipoles in the aggregation efficiency and gradient distribution of color centers and radiation resistance of hydroxyl ions is revealed. It is shown that products of radiation decomposition of OH– ions stimulate, while decay of O2‒ V + dipoles suppress, the formation of positively charged color centers. |
| Databáze: | OpenAIRE |
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