Irradiation induced densification and its correlation with three-membered rings in vitreous silica

0485967 - FZÚ 2018 RIV NL eng J - Journal Article
Gavenda, T. - Gedeon, O. - Jurek, Karel
Irradiation induced densification and its correlation with three-membered rings in vitreous silica.
Journal of Non-Crystalline Solids. Roč. 425, Oct (2015), s. 61-66. ISSN 0022-3093. E-ISSN 1873-4812
R&D Projects: GA ČR(CZ) GA15-12580S
Institutional support: RVO:68378271
Keywords : silica glass * electron irradiation * densification * Raman spectroscopy * glass topology * three-membered rings
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.825, year: 2015

Suprasil silica glass was irradiated by 50 keV electron beam with doses within the range of 3.1–191.1 kC/m2. Volume changes induced by electron irradiation were monitored by means of Atomic Force Microscopy (AFM). Raman spectra were taken from irradiated spots to observe structural changes. Irradiated glasses were annealed at temperatures 500–1000 °C. After annealing irradiated spots were again examined by AFM and Raman spectroscopy in order to observe volume and structural relaxation of radiation-induced changes. Electron beam caused volume compaction that was correlated with D2 peak area for lower doses. D2 peak evolution under irradiation and subsequent annealing showed that topological changes in glass structure are possible deeply below the glass transition temperature.
Permanent Link: http://hdl.handle.net/11104/0280877