Pressure Measurement at High Temperature Using Ten Sm:YAG Fluorescence Peaks
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Theiss, Steven D.
Shiferl, DavidNote: Order does not necessarily reflect citation order of authors.
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CitationZhao, Yuechao, William Barvosa-Carter, Steven D. Theiss, Salman Mitha, Michael J. Aziz, and David Schiferl. 1998. Pressure measurement at high temperature using ten Sm:YAG fluorescence peaks. Journal of Applied Physics 84(8): 4049-4059.
AbstractA high-temperature pressure calibration technique using Sm-doped Y3Al5O12 (Sm:YAG) crystal as the pressure calibrant has been developed by studying its Y1 through Y10 fluorescence peaks (frequencies from 15 600 to 17 200 cm–1) at pressures (p) from 1 bar to 19 GPa and temperatures (T) from 20 to 850 °C in externally heated diamond anvil cells. The entire spectrum was fit to a sum of ten Lorentzians plus a linear background. The positions, relative intensities and widths were represented by empirical functions of p and T. Several fitting routines for p determination were created based on these dependences, and were tested on various high-p and high-T experimental Sm:YAG fluorescence spectra. The p values obtained from the fitting routines are compared with those obtained from the ruby and the nitrogen (N2) vibron pressure scales. A fitting routine is proposed that can determine p from 20 to 850 °C within an estimated uncertainty of 0.4 GPa.
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