Luminescence Imaging of Water During Irradiation of Beta Particles With Energy Lower Than Cerenkov-Light Threshold
Luminescence Imaging of Water During Irradiation of Beta Particles With Energy Lower Than Cerenkov-Light Threshold
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DOI：
10.1109/trpms.2017.2710080
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发表时间：
2017-07-01
影响因子：
4.4
通讯作者：
Yamamoto, Seiichi
中科院分区：
文献类型：
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作者：
Yamamoto, Seiichi
在能量低于切伦科夫光阈值的β粒子辐照过程中，水的发光成像被广泛认为是不可能的，因为这种粒子不发射切伦科夫光。与这一共识相反，我们发现水的发光成像实际上是可能的，使用这种相对低能量的β粒子是可能的。来自500 kBq Ca-45β源(最大能量：257 keV)的β粒子被照射到纯水中，并用高灵敏度、冷却的电荷耦合器件相机获取源的发光图像。我们还对一个丙烯酸板和一个塑料闪烁体进行了图像采集。在S的1200次采集时间之后，水在贝塔粒子照射期间的发光图像被可视化。水的β辐射发光强度为0.54光子/MeV，而丙烯酸板的发光强度为3.3光子/MeV。结果表明，用能量低于切伦科夫光阈值的β粒子对水进行发光成像是一种很有前途的β粒子探测和分布测量的新方法。
The luminescence imaging of water during irradiation of beta particles with energy lower than the Cerenkov-light threshold has widely been considered impossible because such particles do not emit Cerenkov light. Contrary to this consensus, we found that luminescence imaging of water is in fact possible with such relatively low-energy beta particles. Beta particles from a 500-kBq Ca-45 beta source (maximum energy: 257 keV) were irradiated to pure water, and the source's luminescence images were acquired with a high-sensitivity, cooled charge-coupled device camera. We also conducted image acquisition for an acrylic plate and a plastic scintillator. The water's luminescence image during beta particle irradiation became visualized after a 1200-s acquisition time. The luminescence intensity with the beta irradiation of water was 0.54 photons/MeV, and the luminescence intensity with that of the acrylic plate was 3.3 photons/MeV. Consequently, we have shown that luminescence imaging of water using beta particles with energy lower than the Cerenkov-light threshold is a promising new method for beta particle detection and distribution measurements.