Temperature Measurements on Shocked Preheated Cerium

Optical radiance and pyrometry methods are now available to measure temperature of shocked materials, and these have been used to study some metals including Sn and Ce. In this work, we have developed a preheated experiment configuration that incorporates velocimetry and optical radiance to simultaneously measure the longitudinal stress and temperature for materials shocked to states along an elevated temperature Hugoniot. This experimental method was used to study cerium metal preheated to approximately 200 Celsius and then shock compressed into the liquid phase. Stress-temperature data obtained in the shocked state and during release were used to determine the Hugoniot state, values for specific heat and Gruneisen gamma, and to obtain information about shock-melting. Details of the experimental methods, analysis, and results will be presented