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Improved calibtration curve for the Sm 2+ :BaFCl pressure sensor
Author(s) -
Comodi P.,
Zanazzi P. F.
Publication year - 1993
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889893006120
Subject(s) - luminescence , diamond anvil cell , analytical chemistry (journal) , high pressure , doping , diamond , materials science , chemistry , atomic physics , physics , thermodynamics , optoelectronics , metallurgy , chromatography
The pressure sensor proposed by Shen, Gregorian & Holzapfel [ High Press. Res. (1991), 7 , 73–75], based on the pressure‐dependent shift of the luminescence line due to the 5 D 0 − 7 F 0 electronic transition of Sm 2+ in a matrix of BaFCl, has been tested in a diamond‐anvil cell and calibrated against the R 1 − R 2 doublet shift of ruby and the known NaCl equation of state, in the pressure range between 0.0001 and 4.3 GPa. The parabolic dependence of the shift from the pressure can be approximated by the equation Δ (nm) = 1.46 P − 0.047 P 2 , where the shift, Δ , is in nm and the pressure, P , in GPa. The estimated error in the pressure measurements is 5%. The Sm 2+ : BaFCl luminescence sensor can be advantageously used in the low to moderate pressure range (0.0001–5 GPa or more).