Chen, Liuping and Gross, Thomas and Krienke, Hartmut and Luedemann, Hans-Dietrich (2001) T,p-dependence of the self-diffusion and spin-lattice relaxation in fluid hydrogen and deuterium. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 3 (11). pp. 2025-2030. ISSN 1463-9076
Full text not available from this repository.Abstract
Self-diffusion coefficients D were studied for fluid hydrogen and fluid deuterium at pressures up to 200 MPa and in the temperature range 171-372 K by the spin echo method. Spin-lattice relaxation times of both nuclei were measured in the same p,T range. The diffusion coefficients D are described by the rough hard sphere (RHS) model invoking the rotation translation coupling parameter A=1. Activation parameters are also derived. The dynamic isotope effect of D given by D-r=D(H-2)/D(D-2) is a function of p and T and varies from D(r)approximate to1.1 at the lowest pressures and highest temperatures to D(r)approximate to1.3 for the highest pressures and lowest temperatures reached. The spin-lattice relaxation is for both compounds dominated by the spin-rotation interaction. Only for T-1(H-2) at T=171 K can a minor contribution from dipole-dipole relaxation be derived from the data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-RESOLUTION NMR; MOLECULAR LIQUIDS; HIGH-PRESSURE; DEPENDENCE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Mar 2022 14:36 |
| Last Modified: | 07 Mar 2022 14:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41938 |
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