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- W2068765525 abstract "The spectral band profiles of the Ē→4A2g and 2Ā→4A2g transitions of Cr3+ in Al2O3, i.e., the commonly known ruby 6943 Å (R1) and 6929 Å (R2) emission lines, in the temperature range 10–300 K were recorded and deconvoluted numerically with excellent accuracy into a Lorentzian (homogeneous) component and a Gaussian component. The Gaussian width was taken as arising from sample inhomogeneity and spectrometer slit function, and as expected was found to be independent of temperature. The Lorentzian width was found to vary with temperature in accordance with the two-phonon relaxation processes reported previously, plus a thermal broadening process. While the former processes were quenched completely as temperature was lowered to about 90 K, the latter process, describable with the Debye–Waller factor, still caused a Lorentzian width of about 0.2 cm−1 (for both R1 and R2 lines) which then leveled out quickly to about 0.1 cm−1 as the temperature was lowered further. For temperatures above 100 K, the positions of the R1 and R2 lines were found to have the same temperature dependence as that reported previously. The use of the temperature dependencies of Lorentzian width and line position for temperature sensing was discussed; such an instrument could indeed be made portable because of the simple optical and electronic systems used in our experiments." @default.
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- W2068765525 date "1994-04-01" @default.
- W2068765525 modified "2023-10-06" @default.
- W2068765525 title "Ruby spectral band-profile analysis for temperature sensing" @default.
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- W2068765525 doi "https://doi.org/10.1063/1.356071" @default.
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