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- W2033419641 abstract "The low to high-field transition in KZnF<SUB>3</SUB>:Cr<SUP>3+</SUP>, induced by external pressure was observed through photoluminescence measurements at room temperature, T equals 90 K and T equals 20 K. Direct measurement of the lowest electronic level separation (Delta) , was accomplished through the low temperature experiments. Pressure coefficients of (Delta) are given. Emission spectra of KZnF<SUB>3</SUB>:Cr<SUP>3+</SUP> obtained at several pressures and temperatures in the range [20 K - 90 K] allow for the construction of a Tanabe-Sugano type diagram illustrating the transition from low- to high-crystal-field regime for cubic and distorted centers. Assignments of sharp lines are given based on the analysis of these diagrams, time-resolved spectroscopy and transition lifetime. Emission measurements were performed at atmospheric pressure and low temperature outside the pressure cell and also at several pressures for KZnF<SUB>3</SUB>:Co<SUP>3+</SUP>. Comparing the zero-phonon line positions and using the phonon dispersion relation of the host material and fine structure in the emission spectrum of KZnF<SUB>3</SUB>:Co<SUP>2+</SUP> was identified. Pressure coefficients were obtained for several among the emission lines from which the values for zero-phonon lines were deduced. Analysis show that the spin-orbit parameter changes with pressure are negligible in KZnF<SUB>3</SUB>:Co<SUP>2+</SUP>." @default.
- W2033419641 created "2016-06-24" @default.
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- W2033419641 date "1999-07-06" @default.
- W2033419641 modified "2023-10-03" @default.
- W2033419641 title "<title>Pressure effects in the electronic levels of tunable laser materials</title>" @default.
- W2033419641 doi "https://doi.org/10.1117/12.358433" @default.
- W2033419641 hasPublicationYear "1999" @default.
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