Temperatures of shocked CCl4 measured by precise two-band time-resolved radiometry in the 7-12 mu m spectral range

Time-resolved infrared radiometry and a new data analysis technique are use d to measure, for the first time, the equilibrium vibrational temperatures and average optical properties of an initially transparent liquid, CCl4, al ong the principal Hugoniot. Radiance histories were observed with about 10 ns time resolution in two slightly overlapping bands, approximately 7-9.5 m um and 9-12 mum, for shock pressures from 3.3 to 9.4 GPa. The corresponding temperatures, 680-1370 K, are very consistent with the optical pyrometry a t somewhat higher pressures reported by other groups and the results of exi sting theoretical calculations. (C) 2001 Published by Elsevier Science B.V.