Optical Emission from Shock-Compressed Fused Silica
S. A. Bordzilovsky, S. M. Karakhanov
Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: silica, temperature, shock waves, emissivity, absorption coefficient, color temperature
Abstract
The brightness and color temperatures of shock-heated fused silica were determined at thermal radiation wavelengths of ~390 to 630 nm using a four-channel pyrometer. The measurements were carried at shock compression pressures of 27.6-50.5 GPa. It is shown that the emission spectrum of shock-heated fused silica is a superposition of the thermal emission spectrum and the line spectrum. Baric dependences of the emissivity and absorption coefficient of shock-compressed fused silica were determined.
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