Results 1 to 10 of about 2,750 (239)
Nucleation and cavitation in parahydrogen
Chemical Physics, 2012 We have used a density functional approach to investigate thermal homogeneous nucleation and cavitation in parahydrogen. The effect of electrons as seeds of heterogeneous cavitation in liquid parahydrogen is also discussed within the capillary model. (C) 2011 Elsevier B.V. All rights reserved.
Martí Pi +3 more
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Parahydrogen Conversion on Tungsten
Nature, 1940THIS reaction1 has been reinvestigated using a reaction tube containing a second short filament adjacent to the catalyst filament, so that adsorbed films on the latter might be detected by a measurement of their contact potential2. In this way it was shown that the filament in its most catalytically active state was free from adsorbed oxygen.
D. D. ELEY, E. K. RIDEAL
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The Parahydrogen Conversion on Metals
Bulletin des Sociétés Chimiques Belges, 1958AbstractLa conversion à basse température de l'hydrogène sur l'or diamagnétique fournit, quoique dans une mesure moindre qu'avec l'aluminium paramagnétique, des indications sur les valences libres superficielles postulées dans des calculs sur les chaleurs de chimisorption.L'effet de la pression à 90° K et à 195° K montre que la conversion est d'ordre 0
A. Couper +3 more
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Applications of the Parahydrogen Phenomenon in Inorganic Chemistry
ChemInform, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Damir, Blazina +3 more
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Superplasticity of solid parahydrogen
Soviet Journal of Low Temperature Physics, 1984The plastic properties of single-crystal specimens of parahydrogen have been studied at helium temperatures. It was found that the plasticity increases sharply as the temperature is reduced to 1.8-2 K. The phenomenon of flow of sufficiently perfect p-H2 crystals under the force of gravity was observed.
L. A. Alekseeva, I. N. Krupskiĩ
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Solid Parahydrogen Thickness Revisited
Applied Spectroscopy, 2019We report updated infrared (IR) absorption measurements on vapor-deposited cryogenic parahydrogen (pH 2 ) solids that indicate a ≈10% systematic error in our previous approach for determining a pH 2 solid's thickness (S. Tam and M.E. Fajardo.
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The Scattering Properties of Gaseous Parahydrogen
Journal of Low Temperature Physics, 2021In this work, the scattering properties of parahydrogen gas (p-H2) are studied in the temperature-range (1–50) K. These properties are investigated within the framework of the Lippmann–Schwinger formalism for p-H2. This formalism is used to calculate the phase shifts. The calculations are undertaken using Silvera-Goldman potential.
A. A. Alzboun +2 more
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Equation of state for parahydrogen
Cryogenics, 1964A pressure-explicit equation of state is presented for parahydrogen describing the experimental data of Goodwin, Diller, Roder, and Weber, which consist of over 1,200 points ranging between 2 and 365 atm, 19 and 100 deg K, and 0.0011 and 0.044 moles/cm/sup 3/.
E.A. Tkachenko +2 more
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Diffusion of hydrogen fluoride in solid parahydrogen
The Journal of Chemical Physics, 2013We studied diffusion of hydrogen fluoride (HF) in solid parahydrogen (pH2) around 4 K. Diffusion rates were determined from time dependence of FT-IR spectra of HF monomers. The absorption of HF monomers shows temporal decay due to dimerization reaction via diffusion.
Hiroki, Ooe +9 more
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Measurements of the Viscosity of Parahydrogen
The Journal of Chemical Physics, 1965The coefficient of shear viscosity η of parahydrogen has been measured by the torsional crystal method at temperatures from 14° to 100°K and at pressures up to 345 atm. Twenty compressed fluid isotherms encompass the density range 0.003–0.087 g/cm3 and include the critical region. The precision and accuracy of the measurements is about 0.5%.
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