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Silica glass samples were implanted with 1.157GeV 56 Fe and 1.755GeV 136 Xe ions to fluences range from 1×10 11 to 3.8×10 12 ions/cm 2 . Virgin and irradiated samples were investigated by ultraviolet (UV) absorption from 3 to 6.4eV and photoluminescence (PL) spectroscopy. The UV absorption investigation reveals the presence of various color centers (E′ center,...
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