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准确测定经核燃料后处理得到的铀产品中的钚同位素比值,可大致判断铀的来源,这对防止核扩散、铀产品的质量控制具有重要意义。但核燃料后处理铀产品中钚的量非常低(小于1ng/g),精密测量其中痕量钚的同位素丰度比具有较大技术难度。
Accurate determination of the plutonium isotope ratio of uranium products obtained after nuclear fuel reprocessing can roughly determine the source of uranium, which is of great importance in preventing the proliferation of uranium products and controlling the quality of uranium products. However, the amount of plutonium in post-processing uranium products of nuclear fuel is very low (less than 1ng / g), and it is more technical difficulty to accurately measure the abundance ratio of trace amounts of plutonium in it.