Investigation of isentropic compression and equations of state of fissionable materials
L.V. Al’tshuler a
Ya.B. Zel’dovich b
Yu.M. Styazhkin b
a Institute of Thermophysics of Extreme States, Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13/19, Moscow, 125412, Russian Federation
b All-Russian Scientific Research Institute of Experimental Physics — Federal Nuclear Centre, prosp. Mira 37, Sarov, Nizhny Novgorod region, 607190, Russian Federation
In 1957, to enable the experimental study of fissionable materials at pressures of tens and hundreds of atmospheres, a new approach, which came to be known as the ’’Nonexplosive Chain Reaction’’ method, was suggested at VNIIEF. Based on compressibility data obtained with the NCR and shock wave methods, the equations of states of plutonium and uranium at record high pressures and densities were constructed.