Influence of hydrogen on paramagnetic defects induced by UV laser exposure in natural silica

6533b81ffe1ef96bd1277cb8

RESEARCH PRODUCT

Influence of hydrogen on paramagnetic defects induced by UV laser exposure in natural silica

Roberto Boscaino Fabrizio Messina Marco Cannas

subject

In situ Condensed Matter - Materials Science Materials science Hydrogen Annealing (metallurgy)Materials Science (cond-mat.mtrl-sci)FOS: Physical sciences chemistry.chemical_element Photochemistry Crystallographic defect law.invention Amorphous solid Paramagnetism UV laser chemistry law Radiolysis natural silica Electron paramagnetic resonance Hydrogen

description

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 temperature evidenced the annealing of E' centers and the growth of H(II) centers both occurring in the post-irradiation stage and lasting a few hours. These transients are caused by reactions involving molecular hydrogen H2, made available by dimerization of radiolytic H0.

year	journal	country	edition	language
2005-01-01

http://hdl.handle.net/10447/5934

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