Investigation of water diffusion into quartz using ion beam analysis techniques |
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| Authors: | O Dersch A Zouine F Rauch J E Ericson |
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| Institution: | Institut für Kernphysik, Johann Wolfgang Goethe Universit?t, D-60486 Frankfurt, Germany, DE
Department of Environmental Analysis and Design, University of California, Irvine, CA 92717, USA, US
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| Abstract: | Diffusion of water into quartz was studied by measuring H and 18O concentration profiles in surface layers of quartz samples treated hydrothermally in the range of 125° C to 200° C. Sample
surfaces were orientated normal to the c-axis. The measurements were performed using the nuclear reactions 1H(15N,αγ)12C and 18O(p,α)15N. The diffusion profiles have widths of up to 500 nm. Diffusion rate constants derived from the profiles are in the range
of 10–15 cm2/s to 10–18 cm2/s and show a distinct temperature dependence, yielding a rough estimate of about 60 kJ/mole for the activation energy.
Received: 24 June 1996 / Revised: 20 January 1997 / Accepted: 22 January 1997 |
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