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利用兰州重离子加速器提供的60MeV/u的(18)O离子束轰击天然钨靶,通过奇异的多核子转移反应生成(186)Hf.采用快速放射化学分离技术从钨及反应产物的混合物中分离出铪,由高纯锗(HPGe)探测器测量样品的γ活性,观测到了(186)Hf的子体(186)Taγ活性的生长、衰变行为.由此表明:本实验首次合成并鉴别了重丰中子新核素(186)Hf,并测定它的半衰期为(2.6±1.2)min.
The natural tungsten target is bombarded with a 60MeV / u (18) O ion beam provided by a Lanzhou heavy ion accelerator to generate (186) Hf by a singular polynuclear transfer reaction. Hafnium was separated from the mixture of tungsten and the reaction product using a rapid radiochemical separation technique and the γ activity of the sample was measured by a high-purity germanium (HPGe) detector. The growth of Taγ activity of (186) Hf daughter (186) was observed, Decay behavior. The results showed that Hf was first synthesized and identified from heavy heavy neutron (186) and its half-life was determined to be (2.6 ± 1.2) min.