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Effect of impurities on the optical properties of PbWO4 crystals

机译:杂质对PbWO4晶体光学性能的影响

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The effect of excess W and La3+, Y3+, and Mo6+ impurities on the luminescence spectra and the thermally stimulated luminescence of PbWO4 crystals is studied. A high tungsten content (up to 1 at %) in the charge mixture results in a high luminescence intensity in the green spectral region. Lanthanum impurity decreases the transmission in the short-wavelength (k > 29 000 cm(-1)) spectral region. Lanthanum and yttrium impurities decrease the luminescence intensity. At low (10(2) ppm) concentrations, Mo impurity can somewhat increase the light yield. However, the presence of Mo in PbWO4 shifts the absorption-band edge to longer wavelengths, while an increase in the Mo concentration above 10(2) ppm decreases the luminescence intensity. (C) 2005 Pleiades Publishing, Inc.
机译:研究了过量的W和La3 +,Y3 +和Mo6 +杂质对PbWO4晶体的发光光谱和热激发发光的影响。电荷混合物中的钨含量高(最高1 at%)会导致绿色光谱区的发光强度高。镧杂质会降低短波长(k> 29 000 cm(-1))光谱区域的透射率。镧和钇杂质降低了发光强度。在低(10(2)ppm)浓度下,Mo杂质可以稍微提高光产量。然而,PbWO4中Mo的存在将吸收带边缘移至更长的波长,而Mo浓度增加到10(2)ppm以上会降低发光强度。 (C)2005年Pleiades Publishing,Inc.

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