Abstract
The absorption spectra have been measured at temperatures of 7.2–300 K of a \(\gamma \)-irradiated and UV-exposed LiF crystal with an admixture of oxygen and hydroxyl. The coupling force (S) with the phonons of the lattice of the electronic–vibrational transition with the zero-phonon line 436.55 nm is determined from the ratio of the intensities of the zero-phonon line and the vibronic absorption band. Based on the value of S, the nature of the color center responsible for the absorption band of 390 nm and radiation of 490 nm is proposed.
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Funding
The studies were partially supported by the Ministry of Education and Science of the Russian Federation (State task, project no. 3.8401.2017/8.9). Experimental results were obtained on the equipment of the Center for Collective Use “Isotope-geochemical studies” of the Institute of Chemical Chemistry of the Siberian Branch of the Russian Academy of Sciences and the Baikal Center for Nanotechnology of the Irkutsk National Research Technical University.
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Translated by N. Petrov
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Shchepina, L.I., Shendrik, R.Y. & Lazareva, T.S. Electron–Phonon Interaction of Color Centers with a Zero-Phonon Line 436.55 nm in Crystals LiF–O, OH. Opt. Spectrosc. 128, 616–619 (2020). https://doi.org/10.1134/S0030400X20050124
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DOI: https://doi.org/10.1134/S0030400X20050124