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Markus Kreitmeir, Helmut Bertagnolli, Klaus Tödheide, Alan K. Soper

Investigations on the Structure of Fluid Methane by Neutron Diffraction Experiments

Keywords: Neutron diffraction, Zero Mixture, Supercritical, Intermolecular Structure

High pressure neutron diffraction experiments on a mixture of CH₄ and CD₄ as well as on pure deuterated methane CD₄ were performed at three supercritical states. The structure factor was determined at three different densities at a temperature of T=370K. The intra- and intermolecular structure was determined from the structure factor. The results from pure CD₄ are in very good agreement with former neutron diffraction experiments. The experiments on the isotopic mixture allowed the direct determination of the pair correlation function of the molecular centres. The results of the diffraction experiments are presented in this paper.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 221, 06/2007
Pages: 801 - 813

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