STUDY ON RADIATION CLASSIFICATION CHARACTERISTICS OF IMAGING PLATE AND ITS APPLICATIONS

1)不仅对光激发发光进行了研究，还研究了在核辐射入射下发出的提示闪烁。光激发发光强度与激发闪烁强度的比值取决于入射辐射的种类和辐射能量。此外，该比率是比能损失（-dE/dx）的函数。2)成像板可多次读取成功。每次读数与第一次读数的比率取决于入射辐射的种类和能量。然后，我们可以通过比值对种类和能量进行粗略的分类。3)用滤纸捕获极细的钚颗粒，不受氡子体和钍子体的干扰，可以检测到颗粒大小。4)在高温实验室中对极少量放射性污染的分布测量和岩石表面放射性的测量可以在普通大气中进行，而不需要使用屏蔽箱。可探测到的放射性低至-10^<-3> Bq/mm^2.5)对蔬菜和肉类在5-10cm厚的分级屏蔽盒中进行了极低水平的放射性分布测量。这类结果可能在植物学、生理学和考古学等领域提供有用的信息。

1) Not only the study on the photo-stimulated luminescence, we investigated the prompt scintillation which is emitted on the nuclear radiation incidence. The ratio of photo-stimulated luminescence intensity to prompt scintillation intensity depends on the incident radiation kind and radiation energy. Also, this ratio is a function of specific energy loss (-dE/dx).2) Imaging plate can be succeedingly read many times. The ratio of each reading to the first reading depends on the incident radiation kind and energy. Then, we can roughly classify the kind and energy by taking the ratio.3) Very fine plutonium particle captured on a filter paper can be detected without any disturbance of radon and thoron daughters, and the particle size can be known.4) Distribution measurements of very small amount of radioactive contamination in a hot laboratory and radioactivity on a rock surface can be done in an ordinary atmosphere without using a shielding box. The detectable radioactivity was down to -10^<-3> Bq/mm^2.5) Extremely low level radioactivity distribution measurements were done for vegetables and meat in a graded shieding box with a thickness of 5-10cm of lead. This kind of results may give useful informations in the fields of botany, physiology, and archeology.