活化分析的原理是,将欲测定的元素经过中子或其它粒子照射,发生核反应,产生放射性同位素,然后测量其放射性或核反应过程中放出的射线,根据其强度,计算出该元素的含量。一般都是采用相对测量法,取标准样品和试样在相同条件下照射和测量,最后比较其放射性,得出所测元素含量。 The principle of activation analysis is that the element to be measured is irradiated by neutrons or other particles, undergoes a nuclear reaction to produce a radioactive isotope, and then the radiation emitted during its radioactivity or nuclear reaction is measured, and the content of the element is calculated according to its intensity. In general, the relative measurement method is adopted. The standard sample and the sample are irradiated and measured under the same conditions. Finally, the radioactivity is compared to obtain the content of the measured element.