Fluorescence pulses derived from thin poly (ethylene terephthalate) in response to charged particles
Fluorescence pulses derived from thin poly (ethylene terephthalate) in response to charged particles
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DOI：
10.1088/1402-4896/ac237f
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Hidehito Nakamura;K. Mori;Y. Shirakawa
中科院分区：
文献类型：
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作者：
Hidehito Nakamura;K. Mori;Y. Shirakawa
聚对苯二甲酸乙二醇酯（PET）是一种在世界范围内广泛使用的聚酯。它的多功能性扩展到辐射探测和测量。在这里，我们展示了薄PET响应带电粒子的吸引力行为。将厚度为1 mm、3 mm、5 mm的PET样品暴露于来自241 Am放射性源的α粒子和来自90 Sr放射性源的β粒子，并用商业光电探测器进行监测。所获得的脉冲的特征在于时间曲线。根据样品厚度，尽管强度不同，但每种颗粒类型的平均时间曲线在形状方面是相等的。对于1 mm厚的样品，下降的尾部主要遵循指数衰减，α粒子的衰减时间为13.8 ± 0.5 ns，β粒子为10.7 ± 0.3 ns。前缘呈指数增长，两种粒子类型的上升时间为3.3 ± 0.1 ns。这些结果表明，由带电粒子诱导的PET荧光导致与快速检测器响应相当的尖锐脉冲。这方面的知识开辟了潜在的应用薄PET脉冲测量带电粒子的存在。
Poly (ethylene terephthalate) (PET) is an abundant polyester used on a worldwide scale. Its versatility extends to radiation detection and measurements. Here, we show the attractive behaviours of thin PET in response to charged particles. The PET samples with 1-mm, 3-mm, 5-mm thicknesses were exposed to alpha particles from an 241Am radioactive source and beta particles from a 90Sr radioactive source and were monitored with a commercial photodetector. The acquired pulses were characterised by time profiles. Depending on the sample thickness, the averaged time profiles for each particle type were equivalent with regard to shape, despite variations in intensity. For the 1-mm-thick sample, the falling tails predominately followed an exponential decrease with decay times of 13.8 ± 0.5 ns for alpha particles and 10.7 ± 0.3 ns for beta particles. The leading edges increased exponentially, with rise times of 3.3 ± 0.1 ns for both particle types. These results revealed that the PET fluorescence induced by charged particles leads to sharp pulses comparable to rapid detector responses. This knowledge opens up potential applications of thin PET to pulse measurements in the presence of charged particles.