Comparison of the pressure-induced frequency shift of Sm:YAG to the ruby and nitrogen vibron pressure scales from 6 to 820 K and 0 to 25 GPa and suggestions for use as a high-temperature pressure calibrant
- Pacific Northwest Laboratory, Richland, Washington 99352 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The pressure-induced frequency shift of the Sm:YAG {ital Y}1 peak at elevated temperature is calibrated against the temperature-corrected Raman shift of the nitrogen vibron and, at temperatures less than 673 K, the {ital R}1 shift of ruby. The results presented here indicate that pressure can be determined from the {ital Y}1 and {ital Y}2 peak frequencies, without temperature correction, from 6 to 820 K and from 1 bar to 25 GPa by using the equations: {ital P}(GPa) ={minus}0.12204 ({omega}{sup {ital Y}1}{sub obs}{minus}16187.2) and {ital P}(GPa)={minus}0.15188 ({omega}{sup {ital Y}2}{sub obs}{minus}16232.2). However, pressure determinations based on {ital Y}2 are less accurate, especially at high temperature. At elevated temperature, the Sm:YAG {ital Y}1 and {ital Y}2 peak frequencies are most accurately determined by curve fitting a spectral window at least 400 cm{sup {minus}1} wide. The spectral range was chosen in order to include the decay of the intensity of the Lorentzian {ital Y}1 peak to a background value and incorporate a third peak at 16360 cm{sup {minus}1}.
- DOE Contract Number:
- W-7405-ENG-36; AC06-76RL01830
- OSTI ID:
- 7068198
- Journal Information:
- Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 71:5; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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47 OTHER INSTRUMENTATION
ALUMINIUM COMPOUNDS
CALIBRATION
CORUNDUM
GARNETS
MEASURING INSTRUMENTS
MINERALS
OXIDE MINERALS
OXYGEN COMPOUNDS
PRESSURE GAGES
RAMAN SPECTRA
RUBY
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SPECTRA
SPECTRAL SHIFT
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
VERY HIGH PRESSURE
YTTRIUM COMPOUNDS