A Raman Microscope Technique for Studying Liquids in a Diamond Anvil Cell

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The diamond anvil cell (DAC) has been used extensively in the study of solids and liquids at high pressure. For liquids it is necessary to use a metal gasket to retain the sample between the anvil faces. The pressure experienced by the fluid can be measured by including a small fragment of ruby, the fluorescence spectrum of which is sensitive to pressure. Several experimental arrangements for observing Raman spectra from a DAC have been tried. For 0° scattering, in which the laser passes straight through the cell, scattered light can be collected with an off-axis elliptical mirror which focuses it onto the entrance slit of the monochromator. Another technique uses a small mirror 15° off normal incidence to the DAC by which the laser is focused onto the sample. A lens then collects the near 180° scattered light and brings it to a focus at the monochromator.

Keywords: High pressure; Liquids; Raman microscope

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/0003702844554143

Affiliations: 1: School of Chemical and Life Sciences, Newcastle upon Tyne Polytechnic, Ellison Place, Newcastle upon Tyne, England, NE1 8ST 2: Thornton Research Centre, P.O. Box 1, Chester, England, CH1 3SH

Publication date: March 1, 1984

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