Optical absorption analysis in the ultraviolet and vacuum ultraviolet region from 4.0 to 9.0 eV has been performed on dierent silica materials. We analysed natural and synthetic silica samples, both as grown and irradiated with dierent irradiations, neutrons, c, and ultraviolet photons. Regardless of irradiation we always observed in the spectrum of irradiated samples the growth of the band at 5.8 eV, a band attributed to the E0 paramagnetic center. Comparing this absorption under dierent irradiation, we suggest the B2 and E absorption bands are not correlated and therefore cannot be assigned to the same defect.
Vacuum ultraviolet absorption in silica samples
ANEDDA, ALBERTO;CARBONARO, CARLO MARIA;CORPINO, RICCARDO;
1999-01-01
Abstract
Optical absorption analysis in the ultraviolet and vacuum ultraviolet region from 4.0 to 9.0 eV has been performed on dierent silica materials. We analysed natural and synthetic silica samples, both as grown and irradiated with dierent irradiations, neutrons, c, and ultraviolet photons. Regardless of irradiation we always observed in the spectrum of irradiated samples the growth of the band at 5.8 eV, a band attributed to the E0 paramagnetic center. Comparing this absorption under dierent irradiation, we suggest the B2 and E absorption bands are not correlated and therefore cannot be assigned to the same defect.
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