SBS properties of high-pressure xenon

For xenon at temperature t equals 19.3 degrees Celsius in a range of density 0.3 g/cm 3 less than or equal to (rho) less than or equal to 1.0 g/cm 3 SBS gain coefficient (g) and phonon lifetimes are measured. It is shown that at the densities higher than (rho) equals 0.5 g/cm 3 SBS gain g levels out, reaching the value g approximately equals 100 cm/GW, and the phonon lifetimes decrease down to (tau) ph equals 25 ns with approaching to a critical point of Xe.