论文部分内容阅读
利用兰州重离子加速器(HIRFL)提供的60MeV/u的18O离子束照射天然铀靶,通过多核子转移反应生成238Th.用快速放射化学分离技术从铀及其反应产物的混合物中分离出Th同位素.使用两台高纯锗(HPGe)探测器测量了样品的γ射线活性,观测到了238Th的β-衰变子体238Pa的γ射线的生长、衰变行为,测定238Th的半衰期为9.4±2.0min.
The natural uranium target was irradiated with 60MeV / u 18O ion beam provided by Lanzhou Heavy Ion Accelerator (HIRFL) and 238Th was generated by multi-nuclear transfer reaction. Th isotopes were isolated from a mixture of uranium and its reaction products using rapid radiochemical separation techniques. The γ-ray activity of the sample was measured using two HPGe detectors. The γ-ray growth and decay behavior of the 238Th β-decayed 238Pα was observed. The half-life of the 238Th was determined to be 9.4 ± 2.0 min .