157 citations · 519 across the 25 of their papers we have counts for
4 papers · 2 filters
Influence of hydrogen on paramagnetic defects induced by UV laser exposure in natural silica
F. Messina, M. Cannas, R. Boscaino
Diffusion limited reactions of point defects were investigated in amorphous SiO2 exposed to UV laser light. Electron spin resonance and in situ absorption measurements at room temp…
Bleaching of optical activity induced by UV Laser exposure in natural silica
M. Cannas, F. Messina
We report experimental data on two types of natural silica, differing for their OH content, irradiated with UV photons (4.66 eV) from a pulsed Nd:YAG laser. Irradiation induces a r…
H(II) centers in natural silica under repeated UV laser irradiations
F. Messina, M. Cannas, R. Boscaino
We investigated the kinetics of H(II) centers (=Ge'-H) in natural silica under repeated 266nm UV irradiations performed by a Nd:YAG pulsed laser. UV photons temporarily destroy the…
In situ observation of the generation and annealing kinetics of E' centers induced in amorphous SiO2 by 4.7eV laser irradiation
F. Messina, M. Cannas
The kinetics of E' centers induced in silica by 4.7eV laser irradiation was investigated observing in situ their optical absorption band at 5.8 eV. After exposure the defects decay…