منابع مشابه
Phase boundary of hot dense fluid hydrogen
We investigated the phase transformation of hot dense fluid hydrogen using static high-pressure laser-heating experiments in a laser-heated diamond anvil cell. The results show anomalies in the heating efficiency that are likely to be attributed to the phase transition from a diatomic to monoatomic fluid hydrogen (plasma phase transition) in the pressure range between 82 and 106 GPa. This study...
متن کاملRaman spectroscopy of hot dense hydrogen.
High P-T Raman measurements of solid and fluid hydrogen to above 1100 K at 70 GPa and to above 650 K in 150 GPa range, conditions previously inaccessible by static compression experiments, provide new insight into the behavior of the material under extreme conditions. The data give a direct measure of the melting curve that extends previous optical investigations by up to a factor of 4 in press...
متن کاملMolecular dissociation in hot, dense hydrogen.
W. R. Magro,1 D. M. Ceperley,2 C. Pierleoni,3 and B. Bernu4 1Theory Center and Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853 2National Center for Supercomputing Applications and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 3Dipartimento di Fisica, Universita de L’Aquila I-67100 L’Aquila, Italy and INFM, sezi...
متن کاملEvidence of a liquid-liquid phase transition in hot dense hydrogen.
We use pulsed-laser heating of hydrogen at static pressures in the megabar pressure region to search for the plasma phase transition to liquid atomic metallic hydrogen. We heat our samples substantially above the melting line and observe a plateau in a temperature vs. laser power curve that otherwise increases with power. This anomaly in the heating curve appears correlated with theoretical pre...
متن کاملThermodynamics and phase separation of dense fully ionized hydrogen-helium fluid mixtures
The free energy of a hydrogen-helium fluid mixture is evaluated for the temperatures and densities appropriate to the deep interior of a giant planet such as Jupiter. The electrons are assumed to be fully pressure ionized and degenerate. In this regime, an appropriate first approximation to the ionic distribution functions can be found by assuming hard-sphere interactions. Corrections to this a...
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ژورنال
عنوان ژورنال: Scientific Reports
سال: 2015
ISSN: 2045-2322
DOI: 10.1038/srep16560