Optical Radiation from Shock-Compressed Fused Silica

The brightness and color temperatures of shock-heated fused silica were determined at in the range of thermal radiation wavelengths from 390 to 630 nm using a four-channel pyrometer. The measurements were carried at shock compression pressures of 27.6–50.5 GPa. The radiation spectrum of shock-heated fused silica is shown to be a superimposition of the thermal radiation spectrum and a line spectrum. Baric dependences of the emissivity and radiation absorption coefficient of shock-compressed fused silica were determined.