H(II) centers in natural silica under repeated UV laser irradiations
Materials Science
2009-11-10 v1 Disordered Systems and Neural Networks
Abstract
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 these paramagnetic defects, their reduction being complete within 250 pulses. After re-irradiation, H(II) centers grow again, and the observed recovery kinetics depends on the irradiation dose; multiple 2000 pulses re-irradiations induce the same post-irradiation kinetics of H(II) centers after each exposure cycle. The analysis of these effects allows us to achieve a deeper understanding of the dynamics of the centers during and after laser irradiation.
Keywords
Cite
@article{arxiv.cond-mat/0410584,
title = {H(II) centers in natural silica under repeated UV laser irradiations},
author = {F. Messina and M. Cannas and R. Boscaino},
journal= {arXiv preprint arXiv:cond-mat/0410584},
year = {2009}
}
Comments
Submitted to Journal of Non Crystalline Solids