Calibration of the R ruby fluorescence lines in the pressure range [0-1 GPa] and the temperature range [250-300 K] |
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Authors: | O Grasset |
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Institution: | UMR 6112, Laboratoire de Planktologie , 2 rue de la Houssinière, BP 92208, 44322, Nantes, Cedex 03, France |
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Abstract: | Abstract The pressure range &1 GPa] and the temperature range 250–300 K] are commonly used in many science fields like biology, agro-chemistry, pharmacology, or geology. In this paper, the calibration of the ruby R lines of fluorescence is performed in these pressure and temperature ranges, using the melting curve of pure water. The linear shifts of ruby peaks are equal to ?0.140cm?1/K and ?0.768cm?1/kbar with R1, and to ?0.137cm?1/K and ?0.779 cm?1/kbar with R2. The accuracy of pressure measurements can be as good as ± 10MPa if the temperature is known with ±0.5 K. Such a precision is achieved if: (1) the position of each peak is determined using an inversion method; (2) daily shifts of the spectrometer are corrected before each acquisition; (3) peak positions of each ruby are known at ambient pressure and temperature. |
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Keywords: | Ruby fluorescence Calibration Sapphire anvil cell Pressure range [0–1 GPa] Temperature range [250–300 K] |
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