The equation of state of dense xenon at high temperature and high pressure

The Hugoniot data of gaseous xenon under shock compression were measured in the pressure range 2.6$\sim $3.8Gpa, and the calculated temperature 42$\sim $50kKby means of a two-stage light-gas gun. Gaseous specimens were shocked from initial pressure 0.8Mpa at 293K. Time-resolved spectral radiation histories were recorded by using a six-wavelength channel pyrometer. Shock velocity was measured and particle velocity was determined by the impedance matching method. The data were discussed in terms of saha model with Debye-H\"uckel correction.