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重丰中子核具有一种特殊的衰变性质,即β-延发裂变。简单介绍这一衰变模式的基本过程,指出了它的研究意义和研究现状,扼要叙述我们的进展情况。 相似文献
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用14MeV中子轰击天然锇靶,取道^192Os(n,α)反应生成^189W。利用改进的锇蒸馏装置蒸馏O8O4,完成锇与反应产物的分离;通过四苯砷铼沉淀除去铼。使用HPGe探测器测量了分离的钨样品的γ射线谱,该γ射线谱显示钨样品中杂质元素的去污是令人满意的。 相似文献
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简单地介绍了重丰中子远离核研究的科学意义,报告了重丰中子新核素的产生、分离和鉴别方法。 相似文献
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液-液萃取从Th中分离Ac 总被引:1,自引:0,他引:1
用234Th、228Ac和139Ce 3做示踪剂,二(2-乙基己基)磷酸做萃取剂,研究了初始HNO3浓度对234Th、228Ac和139Ce 3萃取效率的影响。发现在广泛的酸度范围内,234Th均能被定量地萃取;当HNO3浓度大于2.0mol/L时,228Ac和139Ce3 的萃取效率下降到2%以下。研究了震荡时间对234Th萃取效率的影响,数据显示,1min便可达到萃取平衡。从含大量钍的溶液中分离痕量Ac的实验结果显示,用二(2-乙基己基)磷酸-苯的萃取流程,可使Ac与大量的钍分离,同时Ac的损失又较小。 相似文献
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197Au were irradiated with 47 MeV/u 12C ions. Iridium was produced via the multinucleon transfer reactions in bombardments of 197Au with 12C. and was separated radiochemically from Au and the mixture of the reaction products. The γ radioactivities of Ir isotopes were measured by using a HPGe detector. The production cross sections of Ir isotopes were determined from activities of Ir isotopes at the end of bombardment and the other relative data. It has been found that the cross sections for neutron-rich isotopes of iridium show an exponential dependence on the values of Qgg. Our experimental results also demonstrate lack of correlation between the cross sections and Qgg in the case of neutron-deficient isotopes of iridium. The fact can be explained from that neutron-rich isotopes of iridium were produced in the deep inelastic transfer reactions. 相似文献