4.1 Article

Calibration of ruby (Cr3+:Al2O3) and Sm2+:SrFCl luminescence lines from the melting of mercury: constraints on the initial slopes

Journal

HIGH PRESSURE RESEARCH
Volume 41, Issue 2, Pages 175-183

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/08957959.2021.1931168

Keywords

Pressure calibration; ruby luminescence; Sm-2(+); SrFCl luminescence; mercury melting

Funding

  1. Department of Energy (DOE)-NNSA's Office of Experimental Sciences
  2. COMPRES under NSF [EAR -1606856]
  3. GSECARS under NSF [EAR-1634415]
  4. DOE [DE-FG02-94ER14466]

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The study measured and determined the luminescence shifts of ruby and Sm2+:SrFCl and their relationship with pressure, providing important data for the use of pressure gauges.
We have measured the luminescence shifts of the ruby's R1- and R2-lines and the line of D-5(0)-> F-7(0) from Sm2+:SrFCl corresponding to the melting pressure of mercury that is recommended by the AIRAPT task force as an International Practical Pressure Scale (IPPS). The linear coefficients of the pressure dependence of the R1-, R2-lines, and the luminescence line of Sm2+:SrFCl are determined to be 0.3722 +/- 0.002, 0.3796 +/- 0.002, and 1.123 +/- 0.002 nm/GPa, respectively. The results not only put tight constraints on the initial slopes of ruby and Sm2+:SrFCl gauges, but also link the luminescence-based pressure gauges to the more fundamental primary piston gauges.

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