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为证明线状源法制备的放射性废物桶与均匀一致填充的废物桶作为标准源其测量结果是等效的,制备了以水为主要填充介质的两种放射性废物桶标准源。所用的放射性核素为152Eu,溶液总活度在制备前通过测量均为已知。线状源废物桶填充介质为水,选择9个套管位置的隔板装配废物桶源,线状源分别放置在距离圆心不同的位置。测量时废物桶旋转,线状源插入其中一个套管中,其它位置的套管填充水,将同一特征峰下不同位置的净峰计数率以离圆心的距离为变量作图(图1)。
In order to prove that the linear source-prepared radioactive waste barrels and the uniformly filled waste barrels are standard sources, the measurement results are equivalent, and two standard radioactive waste barrels with water as the main filling media are prepared. The radionuclide used was 152Eu, and the total activity of the solution was known prior to preparation by measurement. Linear source waste barrels filled with water as the media, select the nine baffle position baffle assembly waste barrels source, linear source were placed in a different location from the center of the circle. During the measurement, the waste bucket rotates, the linear source is inserted into one of the sleeves, and the sleeves in other positions are filled with water. The net peak count rate at different positions under the same characteristic peak is plotted as the distance from the center of the circle as a variable (Figure 1).