Hydrogen and helium under high pressure - A case for a classical theory of dense matter

Details Hydrogen and helium under high pressure - A case for a classical theory of dense matter Hydrogen and helium under high pressure - A case for a classical theory of dense matter

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989em%26p...45..291c&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 45, June 1989, p. 291-298.

Physics

3

Helium, Hydrogen, Matter (Physics), Phase Transformations, Critical Pressure, High Pressure, Metallizing, Solidified Gases

Scientific paper

When subject to high pressure, H2 and He-3 are expected to undergo phase transitions, and to become metallic at a sufficiently high pressure. Using a semiclassical theory of dense matter proposed by Savic and Kasanin, calculations of phase transition and metallization pressure have been performed for these two materials. In hydrogen, metallization occurs at p(M) = (3.0 + or - 0.2) Mbar, while for helium the corresponding value is (106 + or - 1) Mbar. A phase transition occurs in helium at p(tr) = (10.0 + or - 0.4) Mbar. These values are close to the results obtainable by more rigorous methods. Possibilities of experimental verification of the calculations are briefly discussed.

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