title: In situ measurements of the D(1) and D(2) Raman band intensities of vitreous and molten silica in the 77-2150 K temperature range.
abstract: In situ quantitative Raman spectra of vitreous and molten silica were measured from LN(2) temperatures up to above melting and used to calculate the intensities of the two 'defect peaks' D(1) and D(2) associated with the corresponding four- and three-membered ring structures. The D(1) intensity decreases with increasing temperature while the D(2) intensity appears to be invariant to temperature. The data are in disagreement with the quenching/fictive temperature experiments and show definitely no abrupt intensity changes at any temperature.
authors.affiliation: Foundation for Research and Technology Hellas-Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), PO Box 1414, GR-26504 Patras, Greece. Department of Chemical Engineering, University of Patras, GR-26504, Patras, Greece.
authors.forename: G N
authors.initials: GN
authors.lastname: Papatheodorou
authors.forename: A G
authors.initials: AG
authors.lastname: Kalampounias