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- W2024221388 abstract "Swift heavy ion irradiation is carried out on sapphire (α-Al2O3) for controlled modification of its optical properties. Single crystals of α-Al2O3 (0 0 0 1) were irradiated at room temperature with 190 MeV Ag ions having Se∼23 keV/nm with fluences varying from 1011 to 1013 ions/cm2. The pristine as well as irradiated sapphires were characterized by photoluminescence, Fourier transform infrared spectra, optical absorption and X-ray diffraction techniques. The intensity of the PL peak observed at 2.1 eV increases with fluence. X-ray diffraction analysis shows that the surface starts getting amorphized after the fluence of 1 × 1012 ions/cm2. Structural disorder and generation of optically active defect centers (color centers) occur after a fluence of 1 × 1012 ions/cm2. At this fluence the defected zones start overlapping due to multiple ion impact giving rise to cumulative optical response of defects." @default.
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- W2024221388 date "2003-12-01" @default.
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- W2024221388 title "Swift heavy ion irradiation induced modifications in sapphire" @default.
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- W2024221388 doi "https://doi.org/10.1016/s0168-583x(03)01487-3" @default.
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