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Shock Compression of Liquid Helium to 56 GPa (560) KbarShock-wave data are presented for liquid helium which has been compressed to densities up to five times greater than the normal liquid. The helium was heated to temperatures up to 21,000 K, while the maximum pressure attained was 56 GPa. The properties of helium and hydrogen are important for modeling the giant planets Saturn and Jupiter where these elements are the major constituents. Conditions on Saturn are of particular interest because studies have suggested that this planet has an internal energy source which is associated with unmixing and gravitational separation the hydrogen-helium fluid at pressures below 1 TPa. The existence of this phase transition depends very sensitively on the hydrogen and helium equation of state. In the experiments, strong shock waves were generated by the impact of planar projectiles into cryogenic specimen holders.
Document ID
19850015240
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Nellis, W. J.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Holmes, N. C.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Mitchell, A. C.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Trainor, R. J.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Governo, G. K.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Ross, M.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Young, D. A.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA, Washington Repts. of Planetary Geol. and Geophys. program, 1984
Subject Category
Inorganic And Physical Chemistry
Accession Number
85N23551
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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