Abstract:In 1980, a single LiF crystal was irradiated by thermal neutrons up to the exposition dose 10 19 n/cm 2 at the Salaspils nuclear reactor. The crystal has been kept at room temperature for 29 years. Samples in size of 5×4×1 mm 3 were cut from the crystal and some of them annealed at 920 K for 30 min. To study photoluminescence, measurements with a confocal laser scanning microscope Leica TCS SP5 were performed, during which 3D-defects of size of ~1μm 3 were revealed. Photoluminescence was observed in the red sp… Show more
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