Self-Diffusion of Tritium in Natural and Synthetic Ice Monocrystals
- 1 May 1967
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 38 (6), 2553-2556
- https://doi.org/10.1063/1.1709948
Abstract
The self‐diffusion of tritium in artificially and naturally grown ice monocrystals, parallel and perpendicular to the optical axis, was studied between −2.5° and −35.9°C. The plane‐source solution to Fick's second law was used in treating the data. An anisotropy of ≈ 12% was observed. The activation energy was found to be 0.62 eV for all cases and D0 ≈ 10 cm2/sec. Based on the experimental data, it is concluded that the diffusion takes place by a vacancy mechanism, and that entire H2O molecules are diffusing, i.e., molecular diffusion occurs. Theoretical calculations using the atomic‐diffusion theory and Zener's theory for D0 are in excellent agreement with the experimentally determined diffusion coefficient.Keywords
This publication has 13 references indexed in Scilit:
- Zone-melting apparatus for growing ice monocrystalsMaterials Research Bulletin, 1966
- Diffusion in Organic Crystals. I. Self-Diffusion in AnthraceneThe Journal of Chemical Physics, 1965
- Self-Diffusion in Single Crystals of IceJournal of the Physics Society Japan, 1964
- Observation of Etch Channels on the (0001) Plane of Ice Crystal Produced by Nonbasal GlideJournal of the Physics Society Japan, 1963
- On diffusion, relaxation and defects in icePhysics Letters, 1962
- Thermal Motion in Ice and Heavy IceThe Journal of Chemical Physics, 1958
- Lattice disorder and physical properties connected with the hydrogen arrangement in ice crystalsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
- Gitterfehlordnung und physikalische Eigenschaften hexagonaler und kubischer EiskristalleZeitschrift für Kristallographie, 1958
- Isotopentrennung beim Gefrieren von Wasser und Diffusionskonstanten von D und 18O im Eis. Mit Diskussion der Möglichkeit einer Multiplikation der beim Gefrieren auftretenden Isotopentrennung in einer HaarnadelgegenstromvorrichtungHelvetica Chimica Acta, 1958
- Correlation factors for diffusion in solidsTransactions of the Faraday Society, 1956