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Equation of State of Helium and Polybutene and Raman Spectrum of Water at High Shock Pressures and Temperatures

  • W. J. Nellis (a1), N. C. Holmes (a1), A. C. Mitchell (a1), R. J. Trainor (a1), M. B. Boslough (a1), F. H. Ree (a1) and G. E. Walrafen (a2)...

Abstract

Liquid helium was shock-compressed in Hugoniot equation-of-state measurements at pressures of 1.2 and 16 GPa (12 and 160 kbar) using a two-stage light-gas gun [1]. Specimens were initially at a temperature of 4.3 K and a molar volume of 32 cm3/mole. Specimen holders were a refinement of the cryogenic targets used for liquid H2 and D2 experiments [2]. The data are in good agreement with the published theoretical prediction of Young, et al.[3] The high shock temperatures test the repulsive pair potential to an interatomic spacing approaching 1 Å, which is comparable to a solid volume at a temperature of 0 K of about 0.5 cm3/mole.

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References

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1. Mitchell, A. C. and Nellis, W. J., Rev. Sci. Instrum. 52, 347359 (1981).
2. Nellis, W. J., Mitchell, A. C., van Thiel, M., Devine, G. J., Trainor, R. J., and Brown, N., j. Chem. Phys. 79, 14801486 (1983).
3. Young, D. A., McMahan, A. K. and Ross, M., Phys. Rev. B 24, 51195127 (1981).
4. Rice, M. H. and Walsh, J. M., J. Chem. Phys. 26, 824830 (1957);
4a Cowperthwaite, M. and Shaw, R., J. Chem. Phys. 53, 555560 (1970).
5. Ree, F. H., J. Chem. Phys. 70, 974983 (1979).

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