Spectroscopy at very high pressures. X. Use of ruby R-lines in the estimation of pressure at ambient and at low temperatures

Adams, David M.; Appleby, Roger; Sharma, Shiv K.

doi:10.1088/0022-3735/9/12/034

Cited by 104 publications

(28 citation statements)

References 23 publications

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“…The latter served to estimate the applied pressure to the sample from the shift of the R 1 fluorescence line. Hydrostatic pressure conditions were monitored by checking the separation of the R 1 and R 2 lines and their half-width [6].…”

Section: Methodsmentioning

confidence: 99%

Raman scattering study of monoclinic and cubic tetracyanoethylene under high pressures

1985

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Raman scattering spectra of the cubic and monoclinic phases of tetracyanoethylene in the external-mode region have been investigated as a function of hydrostatic pressure in a diamond-anvil cell. There is evidence of a possible transition from the cubic phase to a new unknown phase at 13 kbar. The intensities of the Raman spectra are found to vanish at high pressures. Calculation of phonon frequencies as a function of pressure has been carried out in both the cubic and monoclinic phases using atom-atom potentials with a semi-rigid molecule model which takes account of both the external vibrations and those internal vibrations up to 300 cm -1. The calculated frequencies and mode-Gr/ineisen parameters are compared with the experiments, and Zallen's vibrational scaling law has been successfully investigated.

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Section: Methodsmentioning

confidence: 99%

Raman scattering study of monoclinic and cubic tetracyanoethylene under high pressures

1985

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“…which is the basis (when calibrated [16,20,21,25]) for ruby pressure measurement in the DAC and other high-pressure experiments, and which provides insight into the origin of the pressure proportionality constant Π = (2Π + Π ). Both Π and Π are usually positive and hence pressure decreases the fluorescence energy (or increases the wavelength of the fluorescent light [16,20]).…”

Section: Stressmentioning

confidence: 99%

“…In the early 1970s, the process was turned around somewhat, and the details of crystal field theory were overtaken by empirical advances. In particular, calibrated experimental determination of shifts in the R1 and R2 line energies, , as a function of hydrostatic pressure [16][17][18][19][20][21][22] became the standard method for measuring pressure in high-pressure experiments involving the diamond anvil cell (DAC)-a method that continues to this day [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], although not without debate regarding calibration coefficients. (Here and throughout, citations within a topic are given in chronological order of publication.)…”

Section: Introductionmentioning

confidence: 99%

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Cook

Michaels

2017

J. RES. NATL. INST. STAN.

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The numerical coefficients linearly relating the effects of stress (including pressure), temperature, and composition to shifts in the energies of the Cr-related fluorescence in alumina (Al2O3) are reviewed. The primary focus is the shift of the R1 and R2 “ruby” fluorescence lines under conditions typical for stress determination in polycrystalline Al2O3. No significant experimental difference in the R1 and R2 responses is observed for hydrostatic stress (or pressure) conditions (average shift coefficient of about 7.6 cm−1/GPa), changes in temperature (about 0.140 cm−1/K), or variations in composition (about 120 cm−1/mass fraction of Cr). There are significant differences in the R1 and R2 responses for nonhydrostatic stress conditions. In particular, for uniaxial stress along the a and c directions in the Al2O3 crystal, the R1 piezospectroscopic tensor coefficients (about 3.0 cm−1/GPa and 1.6 GPa cm−1/GPa, respectively) differ considerably, whereas the R2 coefficients (about 2.6 cm−1/GPa and 2.3 GPa cm−1/GPa, respectively) do not. Measurements of the piezospectroscopic tensor coefficients are shown to have interlaboratory relative consistency of about 4 % extending over 30 years, and are consistent with the scalar high-pressure measurements. Measurements of the temperature coefficients are shown to have interlaboratory relative consistency less than 1 % extending over 60 years. Fluorescence-based measurements of stress in polycrystalline Al2O3, although requiring temperature adjustment, are shown to have a relative uncertainty of about 2.5 %.

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“…[39][40][41] Chai and Brown 42 point out that the R2 line is insensitive to nonhydrostatic pressures, while the R1 is. One might consider using the R2 line; however, R1 and R2 lines are thermalized and at liquid helium temperatures only the R1 fluoresces.…”

Section: A Rubymentioning

confidence: 99%

The ruby pressure standard to 150GPa

Chijioke

Nellis

Солдатов

et al. 2005

Journal of Applied Physics

242

173

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A determination of the ruby high-pressure scale is presented using all available appropriate measurements including our own. Calibration data extend to 150 GPa. A careful consideration of shock-wave-reduced isotherms is given, including corrections for material strength. The data are fitted to the calibration equation P = ͑A / B͓͒͑ / 0 ͒ B −1͔ ͑GPa͒, with A = 1876± 6.7, B = 10.71± 0.14, and is the peak wavelength of the ruby R1 line.

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Spectroscopy at very high pressures. X. Use of ruby R-lines in the estimation of pressure at ambient and at low temperatures

Cited by 104 publications

References 23 publications

Raman scattering study of monoclinic and cubic tetracyanoethylene under high pressures

Raman scattering study of monoclinic and cubic tetracyanoethylene under high pressures

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

The ruby pressure standard to 150GPa

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