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离子交换树脂在提取铀的过程中,同时也将溶液中的杂质元素如磷、硅等吸附上去,随着吸附量的增加,将严重影响树脂分离铀的效率,称为树脂“中毒”现象。因此,为分别研究磷、硅含量对离子交换过程和“中毒”现象的影响,发展快速、准确测定树脂中磷、硅含量的分析方法是必要的。 14MeV中子与磷和硅作用,可产生(n,p)、(n,α)和(n,2n)反应。~(31)P(n,α)~(28)Al和~(28)Si(n,p)~(28)Al反应都生成~(28)Al,后者放出半衰期为2.3分钟的1.78MeV γ射线。~(31)P(n,2n)~(30)P反应放出半衰期2.5分钟的β~+
Ion exchange resin in the process of extracting uranium, but also the solution of impurities such as phosphorus, silicon adsorption up, with the adsorption capacity will seriously affect the efficiency of resin separation of uranium, known as resin “poisoning” phenomenon. Therefore, in order to study the influence of phosphorus and silicon contents on the process of ion exchange and “poisoning” respectively, it is necessary to develop a rapid and accurate method for the determination of phosphorus and silicon in resin. 14MeV neutrons react with phosphorus and silicon to produce (n, p), (n, α) and (n, 2n) reactions. The reaction of ~ (31) P (n, α) ~ (28) Al with ~ (28) Si (n, p) ~ (28) Al produced ~ (28) Al and the latter emitted 1.78MeV with a half- Gamma rays. ~ (31) P (n, 2n) ~ (30) P reaction release half-life of 2.5 minutes of β ~ +