Sound Velocity in Natural Shock-compressed Uranium in a Pressure Range of 20 - 260 GPa
D. G. Pankratov, A. K. Yakunin, A. G. Poptsov, D. T. Yusupov
All-Russian Scientific Research Institute of Technical Physics, Snezhinsk, 456770 Russia
Keywords: natural uranium, sound velocity, phase transition, shock-wave loading, manganin sensor method, indicator method
Abstract
This paper presents the results of sound velocity measurements performed in natural uranium during the high-rate deformation of sound in α- and γ-phase regions, as well as in the melting region at the shock front. The processes are recorded using the manganin sensor method (range 20 ÷ 110 GPa) and the indicator method (range 70 ÷ 260 GPa). In the region of the solid uranium phase, changes in Poisson's ratio, Young's modulus, bulk modulus, and shear modulus along the uranium shock adiabat are determined.
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