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The thermoluminescence (TL) properties of Ce3+ doped NaSr4(BO3)3 phosphor under the β-ray irradiation were reported. The polycrystalline sample was synthesized by high temperature solid-state reaction. The TL glow curve of NaSr4(BO3)3:Ce3+ phosphor was com-posed of only one peak. TL kinetic parameters of NaSr4(BO3)3:Ce3+ were deduced by the peak shape method, the activation energy (E) was 0.590 eV and the frequency factor was 1.008×106s-1. TL dose response was linear in the range of measurement. The 3-dimensional (3D) TL emission spectrum was also recorded, the emission spectrum consisted of two bands located at 441 and 479 nm respectively, corresponding to the characteristic 4f05d1→2F(5/2,7/2) transitions of the Ce3+ ion. The fading behavior of the NaSr4(BO3)3:Ce3+ phosphor over a period of 15 d was also studied. 相似文献
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碳水化合物基脂肪替代物是一种公认安全脂肪替代物,受到人们越来越多关注。淀粉基脂肪替代物是碳水化合物基脂肪替代物一种;该文从原料方面介绍淀粉基脂肪替代物研究状况及制备淀粉基脂肪替代物的原料最新进展。 相似文献
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Long-lasting phosphorescence (LLP) was observed in Ce-doped Y3Al5O12 phosphors synthesized in reducing atmosphere. The characteristic emission of the 2D-2F5/2 and 2D-2F7/2 transition of Ce3+ in photoluminescence (PL) and LLP spectra was studied. It was interesting that the ratio between the peak areas of 2D-2F5/2 and 2D-2F 7/2 transitions in the PL spectrum was different from the ratio of that in LLP emission spectrum. And the ratios had different change regularities with increased Ce3+ concentration. The p... 相似文献
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提出了一种高精度标定索累-巴比涅(Soleil-Babinet)补偿器的新方法.在光谱扫描法测量系统中,将多级半波片置于被测补偿器后,以半波片的延迟量为基准,高精度地标定出补偿器的延迟量所对应的测微丝杆位移.该方法利用光强透过率和波长的关系得到延迟量,避免了光强值直接测量法误差源多、精度不高的缺点;同时解决了光谱扫描法不易测量零级相位器件的问题.实验中以工作波长为633 nm的多级半波片为基准,对Soleil-Babinet补偿器进行标定.分析表明,该方法在确定延迟量为0和λ的位置时,精度可达0.45 nm;0~λ范围之间的延迟量最大测量误差仅为3.2 nm. 相似文献
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