Quasi-elastic neutron scattering in the multi-GPa range and its application to liquid water

Quasi-elastic neutron scattering in the multi-GPa range and its application to liquid water

We present a method which allows quasi-elastic neutron scattering (QENS) at multi-GPa pressures, i.e., pressure conditions which are an order of magnitude higher than possible with QENS till now. The technique uses an opposed-anvil geometry with a sample chamber in the form of a toroid which minimiz...

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Veröffentlicht in:Applied physics letters 2013-11, Vol.103 (19)
Hauptverfasser: Klotz, S., Strässle, Th, Bove, L. E.
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Chambers
Diffusion coefficient
Elastic scattering
Neutron scattering
Neutrons
Self diffusion
Water
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Zusammenfassung:We present a method which allows quasi-elastic neutron scattering (QENS) at multi-GPa pressures, i.e., pressure conditions which are an order of magnitude higher than possible with QENS till now. The technique uses an opposed-anvil geometry with a sample chamber in the form of a toroid which minimizes multiple scattering effects. This method has been applied to measurements of the self-diffusion coefficient of water at 400 K up to 3 GPa. The results demonstrate the potential of this method for studying diffusion over a large pressure and temperature range.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4828661