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目前大样品非破坏、多元素分析的准确性还存在一些困难,尽管中子活化分析在非破坏和高准度多元素方面具有优势,但是面对大样品也显得很困难,这也是近几年许多活化分析专家所关注的问题,为此,IAEA还专门组织了一个CRP合作项目进行攻关。本工作采用高纯Zn片和Zr并结合医院中子照射器(IHNI)的水平束流中子研究了中子在辐照过程中的自衰减特性。
At present, large samples are non-destructive and there are still some difficulties in the accuracy of multi-element analysis. Although neutron activation analysis has advantages in non-destructive and high-precision multi-elements, it is also very difficult to face large samples. This is also the case in recent years Many activists analyze the issues of concern to the experts. To this end, the IAEA has also organized a CRP cooperation project to tackle the problem. In this work, the self-attenuation characteristics of neutrons in the irradiation process were studied by using horizontal neutron beams of high-purity Zn and Zr combined with IHNI.