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New color centers in short-wave range in sodium and lithium fluorides
- Authors: Maksimova N.T.1, Miroshnik D.D.1, Evdokimova A.I.1
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Affiliations:
- Irkutsk State University
- Issue: Vol 88, No 7 (2024)
- Pages: 1039-1044
- Section: Luminescence and Laser Physics
- URL: https://journal-vniispk.ru/0367-6765/article/view/279455
- DOI: https://doi.org/10.31857/S0367676524070062
- EDN: https://elibrary.ru/PCFFPM
- ID: 279455
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Abstract
The formation mechanism of luminescence centers in short-wave range (400—500 nm) in LiF crystals is investigated. It is established, that the investigated centers are own crystal defects created in the result of the radiation-thermal process. The offered model of the center is realized in a NaF crystal. It is revealed, that in sodium fluoride the new centers allow to obtain short-wave luminescence in yellow-green range.
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About the authors
N. T. Maksimova
Irkutsk State University
Author for correspondence.
Email: Natmax_2001@mail.ru
Russian Federation, Irkutsk
D. D. Miroshnik
Irkutsk State University
Email: Natmax_2001@mail.ru
Russian Federation, Irkutsk
A. I. Evdokimova
Irkutsk State University
Email: Natmax_2001@mail.ru
Russian Federation, Irkutsk
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Supplementary files
Supplementary Files
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Fig. 1. Absorption (a) and luminescence (b) spectra of the blue range in LiF crystals. 1 — excitation, 2 — emission.
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3.
Fig. 2. Absorption spectra of color centers in LiF crystals irradiated with gamma quanta at different temperatures. (a) 300 K, (b) 77 K, (c) 1 — 217–253 K, 2 — 440–580 K. Exposure dose of irradiation — 5 103 C kg−1.
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4.
Fig. 3. Absorption spectra (a), (c) and luminescence spectra (b) of color centers in Li F crystals (a) 1 — LiF-O, OH after gamma-ray irradiation; 2 — LiF-O, OH after heat treatment; (b) 1 — luminescence of LiF-O, OH before heat treatment, 2 — after heat treatment; (c) absorption spectra at the boiling point of liquid nitrogen, 1 — R2 band, 2 — band of blue glow centers.
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5.
Fig. 4. Samples of LiF (a) and NaF (b) crystals with characteristic short-wave luminescence, excitation 365 nm.
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