The luminescence of CaWO4: Bi single crystals
The luminescence of CaWO4: Bi single crystals
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DOI：
10.1016/j.jlumin.2005.01.017
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发表时间：
2006
影响因子：
3.6
通讯作者：
Y. Zorenko;M. Pashkovsky;A. Voloshinovskii;B. Kukliński;M. Grinberg
中科院分区：
文献类型：
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作者：
Y. Zorenko;M. Pashkovsky;A. Voloshinovskii;B. Kukliński;M. Grinberg
研究了Bi 3+离子和Bi 3 +-Na+或Bi 3 +-Li+离子对掺杂对CaWO 4晶体发光性能、发光动力学和光产额的影响。结果表明，在272和287 nm的A带激发下，与Bi ~（3+）离子的吸收有关，观察到468 nm的发光峰随时间τ=0.41μs衰减。当Bi离子浓度为50- 500 ppm，Bi ~（3+）离子与Na ~+或Li ~+离子的摩尔浓度相等时，与WO_3-VO络合物缺陷有关的520 nm磷光峰被显著抑制，CaWO_4的闪烁特性得到改善。在室温下观察并讨论了缺陷WO 3-VO和规则WO 42-氧阴离子向Bi 3+离子的能量转移。
Influence of doping with Bi3+ions and Bi3+–Na+or Bi3+–Li+ions pairs on luminescence, emission kinetics and light yield of CaWO4crystals has been investigated. It has been shown that under excitation in the A-band at 272 and 287nm, related to the Bi3+ions absorption, the luminescence peaked at 468nm decaying with time τ=0.41μs is observed. For bismuth concentration 50–500ppm and the equimolar concentrations of the Bi3+ions accompanied by Na+or Li+ions compensators the significant suppression of the phosphorescence peaked at 520nm, related to the defect WO3–VOcomplex, and an improvement of scintillation characteristics of the CaWO4are noticed. Energy transfer from the defect WO3–VOand regular WO42−oxy-anions to Bi3+ions have been observed at room temperatures and discussed.