Abstract
Kinematic and thermodynamic parameters of shock-compressed liquid nitrogen are measured behind the front of a plane shock wave using plane wave and hemispherical shock wave generators. In these experiments, high values of compression parameters (shock-compressed hydrogen density? ≈ 3.25 g/cm3 and temperature T≈ 56000 K at a pressure of P ≈ 265 GPa) are attained. The density, pressure, temperature, and electrical conductivity of the nonideal plasma of shock-compressed liquid nitrogen are measured. A nearly isochoric behavior of the nitrogen shock adiabat is observed in the pressure range P = 100–300 GPa. The thermodynamics of shock-compressed nitrogen is an alyzed using the model of the equation of state in the quasi-chemical representation (SAHA code) as well as the semiempirical wide-range equation of state developed at the Institute of Experimental Physics. Experimental results are interpreted on the basis of calculations as the fixation of the boundary of transition of shock-compressed nitrogen from the polymer phase to the state of a strongly nonideal plasma at P ≈ 100 GPa, ? ≈ 3.4 g/cm3.
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Original Russian Text © M.A. Mochalov, M. V. Zhernokletov, R.I. Il’kaev, A.L. Mikhailov, V.E. Fortov, V.K. Gryaznov, I.L. Iosilevskiy, A.B. Mezhevov, A.E. Kovalev, S.I. Kirshanov, Yu.A. Grigor’eva, M.G. Novikov, A.N. Shuikin, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ-Fiziki, 2010, Vol. 137, No. 1, pp. 77–92.
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Mochalov, M.A., Zhernokletov, M.V., Il’kaev, R.I. et al. Measurement of density, temperature, and electrical conductivity of a shock-compressed nonideal nitrogen plasma in the megabar pressure range. J. Exp. Theor. Phys. 110, 67–80 (2010). https://doi.org/10.1134/S1063776110010097
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DOI: https://doi.org/10.1134/S1063776110010097