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用 60 Me V/u18O离子轰击天然铀靶 ,通过多核子转移反应产生重丰中子同位素 2 3 7Th。使用改进的相对快的分离钍的放射化学流程 ,从大量铀和复杂反应产物混合物中分离钍 ,用高纯锗( HPGe)探测器联同多道分析器对化学分离的钍样品做离线 γ射线谱学研究 ,通过对 2 37Th子体 2 37Pa(半衰期 8.7min)的 853.7ke Vγ射线的生长 -衰变曲线的分析 ,确定 2 37Th的半衰期为 4 .69± 0 .60min。
The natural uranium target is bombarded with 60 Me V / u 18 O ions and heavy heavy neutron isotope 2 3 7Th is generated by the multi-nuclear transfer reaction. Thorium is isolated from a large volume of uranium and complex reaction product mixtures using a modified radiopharmaceutical procedure that separates relatively fast thorium and off-line gamma radiation from chemically separated thoriated samples with a high purity germanium (HPGe) detector in conjunction with a multiplex analyzer Based on the spectroscopic analysis, the growth-decay curve of 853.7 ke v-ray at 2 37 Pa (half-life 8.7 min) for 2 37 Th daughter was determined, and the half-life of 2 37 Th was 4.69 ± 0.60 min.