A novel ionizing radiation sensor utilizing radiophotoluminescence in silver-doped phosphate glass
A novel ionizing radiation sensor utilizing radiophotoluminescence in silver-doped phosphate glass
复制标题
一种利用银掺杂磷酸盐玻璃中的放射光致发光的新型电离辐射传感器
DOI：
10.1117/12.2044829
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Iida
中科院分区：
文献类型：
--
作者：
H. Nanto;Y. Miyamoto;T. Ohno;T. Ikeguchi;K. Hirasawa;Y. Takei;T. Kurobori;T.Yamamoto;T. Iida
掺银磷酸盐玻璃在230 nm左右的紫外光激发下，表现出强烈的光致发光。在X射线辐照的玻璃中，当被辐照的玻璃被大约340 nm的紫外光激发时，观察到了强烈的辐射光致发光(RPL)。结果表明，S的荧光光谱包括峰值约为460 nm(寿命约为6.6 ns)的蓝色发射带和峰值约为560 nm(寿命约为2.2μ)的黄色荧光发射带。荧光强度随着X射线辐照剂量的增加而降低，而RPL强度随着X射线吸收剂量的增加而增加。在523K下，X射线辐照玻璃的RPL强度随退火而降低，而荧光强度随退火而增加。在523K保温40min后，RPL消失，光致发光恢复到原来的强度。这意味着在辐照和热处理过程中，光致发光和相对光致发光之间存在互补关系。在0.01~20GyX射线吸收剂量范围内，RPL强度随X射线吸收剂量的增加而增加，表明掺银磷酸盐玻璃可用于个体辐射监测和环境辐射监测。基于玻璃作为剂量计的潜力，讨论了掺银磷酸盐玻璃在环境辐射监测中的应用，并展示了玻璃对α粒子和重粒子(He、C、Fe粒子)辐照的RPL响应。
Silver (Ag+) doped phosphate glass exhibits an intense photoluminescence (PL) when the non-irradiated Ag+-doped phosphate glass is excited with about 230 nm ultra-violet light. In x-ray irradiated glass, intense radiophotoluminescense (RPL) is observed when the irradiated glass is excited with about 340 nm ultra-violet light. It is found that the RPL spectrum includes two emission bands such as blue emission band peaked at about 460 nm (lifetime: about 6.6 ns) and yellow RPL emission band peaked at about 560 nm (lifetime : about 2.2μs). The PL intensity is decreased with increasing x-ray irradiation dose, while the RPL intensity is increased with x-ray absorbed dose. For the annealing of x-ray irradiated glass at 523 K, the RPL intensity is decreased with annealing, while the PL intensity is increased with annealing. The RPL is vanished and the PL is recovered at original intensity by annealing at 523 K for 40 min. This means that there is a complementary relationship between the PL and RPL on irradiation and heat-treatment processes. The RPL intensity is increased with increasing the x-ray absorbed dose in the range from 0.01 mGy to about 20 Gy, showing that the Ag+-doped phosphate glass can be useful for individual radiation monitoring and environmental radiation monitoring. On the basis of such potentiality of glass as the dosimeter, the application of Ag+-doped phosphate glass on environmental radiation monitoring is discussed and the RPL response of the glass for α- particle and heavy-particle (He, C, Fe particle) irradiation is demonstrated.