Photoluminescence with quasi-white spectrum in LiF-UO2 crystals with color centers

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We study of spectral characteristics of LiF-UO2 crystals with radiation induced color centers and their stability under action of emission of blue light emitting diode. The luminescence band with bandwidth 500—750 nm was observed upon excitation by blue light emitting diode emission. This indicates the possibility of using LiF crystals, containing uranium and radiation induced color centers (F2, F3+), as a phosphor, that possesses high stability due to special radiation treatment, for white light sources.

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作者简介

L. Shchepina

Irkutsk State University

编辑信件的主要联系方式.
Email: schepina@api.isu.ru
俄罗斯联邦, Irkutsk

N. Ivanov

Irkutsk National Research Technical University

Email: schepina@api.isu.ru
俄罗斯联邦, Irkutsk

V. Erofeeva

Irkutsk State University

Email: schepina@api.isu.ru
俄罗斯联邦, Irkutsk

L. Ruzhnikov

Irkutsk State University

Email: schepina@api.isu.ru
俄罗斯联邦, Irkutsk

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2. Fig. 1. Absorption spectra in the visible region of the spectrum of LiF-UO2 crystals of the first (1) and second type (2): before irradiation (a); after X-ray irradiation for 20 min at CT (b); difference spectrum, minus the M absorption band (c). The thickness of the first sample is 3.62; of the second sample, 1.52 mm

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3. Fig. 2. Photoluminescence spectra of LiF-UO2 crystals of the first (1, 3) and second type (2, 4): before irradiation (4); after X-ray irradiation for 20 min at CT (1, 2); and additional irradiation at reduced temperature (3)

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