The Sm:YAG primary fluorescence pressure scale
PBN-AR
Instytucja
Instytut Fizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Geophysical Research: Soilid Earth
ISSN
2169-9356
EISSN
2169-9356
Wydawca
AGU
DOI
URL
Rok publikacji
2013
Numer zeszytu
11
Strony od-do
5805-5813
Numer tomu
118
Identyfikator DOI
Liczba arkuszy
0,52
Słowa kluczowe
en
pressure sensors diamond anvil cells elastic moduli elasticity rocks and minerals
Streszczenia
Język
en
Treść
Primary pressure determinations involve the measurement of pressure without recourse to secondary standard materials. These measurements are essential for ensuring the accuracy of pressures measured in gasketed high-pressure devices. In this study, the wavelength of optical fluorescence bands and the density of single crystal Sm-doped yttrium aluminum garnet Y3Al5O12 (Sm:YAG) have been calibrated as a primary pressure scale up to 58GPa. Absolute pressures were obtained by integrating the bulk modulus determined via Brillouin spectroscopy with respect to volumes measured simultaneously by X-ray diffraction. A third-order Birch-Murnaghan equation of state of Sm:YAG yields V-0=1735.15(26)angstrom(3), K-T0=185(1.5)GPa, and K`=4.18(5). The accompanied pressure-induced shifts of the fluorescence lines Y1 and Y2 of Sm:YAG were calibrated to the primary pressure, thus creating a highly accurate fluorescence pressure scale. These shifts are described as P=(A/B)*{[1+(/(0))](B)-1} with A=2089.91(23.04), B=-4.43(1.07) for Y1, and A=2578.22(48.70), B=-15.38(1.62) for Y2 bands, here =-(0), and (0) are wavelengths in nanometer at pressure and ambient conditions. The sensitivity in the pressure determination of the Sm:YAG fluorescence shift is 0.32nm/GPa, which is identical to that of the ruby scale. Sm:YAG can be considered elastically isotropic up to 58GPa, implying insensitivity of the determined pressure to the crystallographic orientation under nonhydrostatic or quasi-hydrostatic conditions. The Sm:YAG fluorescence shift is apparently also independent of crystallographic orientation, in contrast to that of ruby. Since the Y fluorescence band of Sm:YAG is insensitive to temperature changes, this material is highly suitable for the measurement of pressure at elevated temperatures.
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Original article
Original article presents the results of original research or experiment.
Inne
System-identifier
PBN-R:706343
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