The measuring method of irradiated enriched Hf isotope abundance ratio ^181Hf/^180 Hf and ^182Hf/^180Hf using thermal ionization mass spectrometry (TIMS) was introduced. At the same time, elimination the isobaric interference of ^182W in the measurement was discussed. The results of preliminary study have been obtained.
介绍了用于HI-13串列加速器质谱(Accelerator Mass Spectra,AMS)测量的^(151)Sm实验室参考标准的研制。^(151)Sm是长寿命放射性核素,自然界不存在。通过富集稳定同位素150Sm(n,γ)反应合成^(151)Sm,并以热电离同位素质谱仪(Thermal Ionization Mass Spectrometry,TIMS)测得样品中同位素比^(151)Sm/150Sm为3.75×10-3,相对不确定度为0.06%。然后加入稳定的同位素154Sm稀释,制得^(151)Sm/154Sm比值分别为(9.25±0.08)×10-7、(8.87±0.08)×10-8、(8.08±0.08)×10-9的系列参考标准。
