High-pressure neutron diffraction apparatus for investigating the structure of liquids under hydrothermal conditions

Burkhard Annighoefer, Annalisa Polidori, Anita Zeidler, Henry Fischer, Philip Salmon

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Abstract

A high-pressure setup is described for making neutron diffraction experiments on liquids under hydrothermal conditions. Designs are given for a modied Bridgman unsupported area seal, a fluid separator that keeps apart the liquid sample and pressurising fluid, and a pressure-cell made from the null-scattering alloy Ti0:676Zr0:324.
Special attention is paid to the choice of construction materials used to avoid corrosion by the liquid sample under load at elevated temperatures. The apparatus is used to investigate the structure of heavy water at pressures up to 2 kbar and temperatures up to 250 degC.
Original languageEnglish
Pages (from-to)529-544
JournalHigh Pressure Research
Volume37
Issue number4
DOIs
Publication statusPublished - 25 Oct 2017

Keywords

  • Modied Bridgman unsupported area seal; high-pressure separator; Ti-Zr high-pressure cell; neutron diffraction; structure of water

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