论文部分内容阅读
本工作采用中子活化分析——相对法和以~(198)Au为比较器,~(95)Zr-~(97)Zr为中子注量监测器的单比较器K_0法测定了我国新研制成的两个环境标准参考物质——茶叶和茶树叶中的28种元素含量。实验过程简述如下:包好准确称取的样品(～200mg)后,和用光谱纯试剂配制的化学标准样品、比较器(Au)、注量监测器(Zr)一起送入重水反应堆垂直孔道照射16h(注量率～4×10~(13)n/cm~2·s)。冷却4和14天后分别进行二次γ谱测量。通过相应的γ特征
In this work, the neutron activation analysis-relative method and single comparator K_0 method with ~ (198) Au as the comparator and ~ (95) Zr- ~ (97) Zr as the neutron flux monitor were used to determine the new Developed two environmental standards reference material - tea and tea leaf content of 28 elements. The experimental procedure is briefly described as follows: After the accurately weighed sample (~ 200mg) is packed, it is sent to the vertical channel of the heavy water reactor together with the chemical standard sample prepared with spectroscopic pure reagent, the comparator (Au) and the flow rate monitor (Zr) Irradiation 16h (fluency rate ~ 4 × 10 ~ (13) n / cm ~ 2 · s). After cooling for 4 and 14 days, secondary γ measurements were taken. Through the corresponding γ features