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本文扼要地介绍了利用核反应Li~6(n,α)H~3进行的各种锂同位素的放射化分析方法,并对这些方法的优缺点作了初步的比较。详细地介绍了在小型中子源(Ra-Be源,500毫克镭)上用硫化锌(银)闪烁计数器进行的锂同位素的放射化分析法,并在前人工作的基础上作了一定的改进。对锂试样照射靶子的制备及照射测量条件作了较详细的讨论和介绍。两次核对分析结果表明,分析方法的准确度在±3%左右,在改进测量仪器性能的基础上,测量准确度有希望进一步提高。
In this paper, the methods for the radiometric analysis of various lithium isotopes using the nuclear reaction Li ~ 6 (n, α) H ~ 3 are briefly introduced, and the advantages and disadvantages of these methods are compared. The radiochemical analysis of lithium isotopes using a zinc sulfide (silver) scintillation counter on a small neutron source (Ra-Be source, 500 mg radium) has been described in detail. Based on previous work, Improve. Preparation and irradiation of lithium sample irradiation target conditions made a more detailed discussion and introduction. The results of the two verification analyzes show that the accuracy of the analytical method is about ± 3%. Based on the improvement of the performance of the measuring instruments, the accuracy of the measurement is expected to be further improved.