Results 161 to 170 of about 4,129 (201)

The microscopic dynamics of condensed parahydrogen

Applied Physics A: Materials Science & Processing, 2002
We have measured the almost-pure incoherent scattering function of liquid and solid parahydrogen, using inelastic neutron scattering. The experiments were carried out on TOSCA, a time-of-flight, inverse-geometry, crystalanalyzer spectrometer, operating on the pulsed neutron source at ISIS (UK).
Celli M., Colognesi D., Zoppi M.
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Radiofrequency encoded Only Parahydrogen SpectroscopY

Journal of Magnetic Resonance, 2021
A new pulse sequence aimed to filter out NMR signals coming from thermally polarized protons in PHIP experiments based on the OPSY pulse sequence (Only Parahydrogen SpectroscopY) is presented. In analogy to OPSY, which removes thermal polarization by using a pair of magnetic field gradient pulses with an intensity ratio 1:2 and equal duration, the same
S, Bussandri, R H, Acosta, L, Buljubasich   +2 more
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Parahydrogen Conversion on Tungsten

Nature, 1940
THIS 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, 1958
AbstractLa 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, D. D. Eley, M. J. Hulatt, D. R. Rossington   +3 more
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Superplasticity of solid parahydrogen

Soviet Journal of Low Temperature Physics, 1984
The 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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Applications of the Parahydrogen Phenomenon in Inorganic Chemistry

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Damir, Blazina, Simon B, Duckett, John P, Dunne, Cyril, Godard   +3 more
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Solid Parahydrogen Thickness Revisited

Applied Spectroscopy, 2019
We report updated infrared (IR) absorption measurements on vapor-deposited cryogenic parahydrogen (pH2) solids that indicate a ≈10% systematic error in our previous approach for determining a pH2 solid's thickness (S. Tam and M.E. Fajardo. Appl. Spectrosc. 2001. 55(12): 1634-1644).
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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, Manuel Barranco, Jesús Navarro, ANCILOTTO, FRANCESCO   +3 more
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The Scattering Properties of Gaseous Parahydrogen

Journal of Low Temperature Physics, 2021
In 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, A. F. Al-Maaitah, A. S. Sandouqa   +2 more
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Equation of state for parahydrogen

Cryogenics, 1964
A 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, E.M. Holleran, R.A. Moses   +2 more
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