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The emission lifetime of Sm 2+ ions doped in MFX (M=Ba, Sr; X=Br, I) crystals was investigated as a function of pressure and temperature. The decay of the 5 D J(J=0,1,2) levels showed single exponential relaxation. The analysis of these experiments yielded the position of the lowest 4f 5 5d 1 state as well as non-radiative rate constants. These values were compared...
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