منابع مشابه
High pressure ices.
H(2)O will be more resistant to metallization than previously thought. From computational evolutionary structure searches, we find a sequence of new stable and meta-stable structures for the ground state of ice in the 1-5 TPa (10 to 50 Mbar) regime, in the static approximation. The previously proposed Pbcm structure is superseded by a Pmc2(1) phase at p = 930 GPa, followed by a predicted transi...
متن کاملPolarized Raman spectroscopic study of relaxed high density amorphous ices under pressure.
We have made high density amorphous ice (HDA) by the pressure-induced amorphization of hexagonal ice at 77 K and measured the volume change on isobaric heating in a pressure range between 0.1 and 1.5 GPa. The volume of HDA on heating below ∼0.35 GPa increases, while the volume of HDA on heating above ∼0.35 GPa decreases. The polarized OH-stretching Raman spectra of the relaxed HDAs are compared...
متن کاملSputtering of Ices by High Energy Particle Impact
Electronic excitation of thin films of molecular and rare gas solids by MeV He and H ions is efficient in causing sputtering. The sputtering yields vary widely for different species, even for those with very similar surface binding energy. The sputtering yields for CO, Ar, and N,, for example, differ by a factor of 10. Even more striking for these three is the dependence of the sputtering yield...
متن کاملDYNAMIC SIMULATION OF A HIGH PRESSURE REGULATOR
In this paper, the dynamic simulation for a high pressure regulator is performed to obtain the regulator behavior. To analyze the regulator performance, the equation of motion for inner parts, the continuity equation for diverse chambers and the equation for mass flow rate were derived. Because of nonlinearity and coupling, these equations are solved using numerical methods and the results are ...
متن کاملTheory of amorphous ices.
We derive a phase diagram for amorphous solids and liquid supercooled water and explain why the amorphous solids of water exist in several different forms. Application of large-deviation theory allows us to prepare such phases in computer simulations. Along with nonequilibrium transitions between the ergodic liquid and two distinct amorphous solids, we establish coexistence between these two am...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2011
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1118694109