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首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >Radio-Optically- and Thermally Stimulated Luminescence of Zn(BO2)2:Tb3+ exposed to Ionizing Radiation
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Radio-Optically- and Thermally Stimulated Luminescence of Zn(BO2)2:Tb3+ exposed to Ionizing Radiation

机译：暴露于电离辐射中的Zn（BO 2 ） 2 ：Tb 3 + 的放射性和热激发发光

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The optical absorption of zinc tetraborate at different concentrations of the terbium impurity (0, 0.5, 1, 2, 4, 8 mol%) was analyzed. The radioluminescence (RL) emission spectra was obtained after beta irradiation of a 90Sr/90Y source. The RL spectrum showed the characteristics bands of Tb3+ with two main emissions at 489 nm and 546 nm which corresponding to the5D4 →7F6 and 5D4 →7F5 transitions respectively in this ion. The OSL and TL characteristics have been analyzed. The stimulation blue light (497 nm) of a diode laser at 500 mA was used to bleach the thermoluminescent (TL) signals obtained with 5Gy of 60Co source. The two main glow peaks (79 and 161 °C) are sensitives under 497 nm stimulation, and they were shifted to higher temperature values and faded their TL intensities. Similar behavior of TL glow curves before and after OSL stimulation with blue light was observed when the samples were exposed to 30 Gy gamma dose of 137Cs irradiator. The OSL signal response was linear with the dose range of 1-10 Gy and increased their response up to 200 Gy gamma dose. The OSL shows a bleaching sensitive shallow traps and diminishing the intensity of the TL glow curves remaining a complex traps distribution. The RL, TL and OSL properties were investigated in Zn(BO2)2:Tb3+ phosphor.
机译：分析了在不同浓度的impurity杂质（0、0.5、1、2、4、8 mol％）下四硼酸锌的光吸收。在对 90 Sr / 90 Y源进行β辐射后获得了放射发光（RL）发射光谱。 RL光谱显示了Tb3 +的特征谱带，在489 nm和546 nm处有两个主发射，对应于 5 D 4 → 7 F该离子中的 6 和 5 D 4 → 7 F 5 跃迁。已经分析了OSL和TL特性。使用二极管激光器在500 mA处的激发蓝光（497 nm）漂白5Gy 60 Co源获得的热致发光（TL）信号。在497 nm刺激下，两个主要辉光峰（79和161°C）是敏感峰，它们移至较高的温度值并减弱了TL强度。当样品暴露于30 Gyγ剂量的 137 Cs辐照器时，在蓝光OSL刺激前后，TL发光曲线具有相似的行为。 OSL信号响应与1-10 Gy剂量范围呈线性关系，并在200 Gyγ剂量以下增加其响应。 OSL显示出漂白敏感的浅陷阱，并减少了TL辉光曲线的强度，从而保留了复杂的陷阱分布。在Zn（BO2）2：Tb3 +荧光粉中研究了RL，TL和OSL特性。

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