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The single crystal ZnWO 4 :Tm 3+ has been grown by Czochralski method. The XRD, refractive index, absorption and fluorescence spectra are measured. The Judd–Ofelt parametersΩ2, Ω4, Ω6 are obtained to be 6.3×10 −20 , 1.3×10 −20 , 1.4×10 −20 cm 2 , respectively. The fluorescence decay time of the 3H4 level is measured to be 0.113ms and the quantum efficiency...
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