Influence of stoichiometry on the optical properties of lead tungstate crystals

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• 作者：Belsky ; A.N. ; Klimov ; S.M. ; Mikhailin ; V.V. ; Vasil'ev ; A.N. ; Auffray ; E. ; Lecoq ; P. ; Pedrini ; C. ; et. al.
• 刊名：Chemical Physics Letters
• 出版年：1997
• 期刊代码：7_00092614
• 类别：ph
• 出版时间：October 3, 1997
• 卷：277
• 期：1-3
• 页码：65-70
• 文件大小：445 K

摘要

A series of PbWO₄ crystals, grown consistently from one melt, were studied under excitation by VUV and X-ray synchrotron radiation. We observed a systematic change in the spectroscopic data (emission spectra, luminescence decay, thermoluminescence, radiation hardness) from the first grown to the last. In the reflectivity spectrum, the intensity in the 4-6 eV absorption region, which is assigned to the Pb²⁺ 6s-6p transitions, decreases relative to the intensity in the 7-10 eV region which is due to (WO₄)^2− absorption. We connect these changes with the variation in stoichiometry of the melt during crystal growth.