Coprecipitation behavior of element 104, Rf, with Sm hydroxide

为了建立一种新的超重元素化学实验方法，我们开发了一种快速制备氢氧化sm共沉淀样品的方法，该样品在α光谱中具有良好的能量分辨率。为了研究104号元素Rf的共沉淀，我们研究了4族元素Zr、Hf和Th的共沉淀行为，并开发了一种快速制备沉淀样品的装置。利用所研制的仪器进行了85Zr和169Hf的在线共沉淀实验，确定了Rf的实验条件。然后，我们在RIKEN的AVF回旋加速器上用248Cm(18O, 5n)261Rf反应生成了261Rf，并研究了其在NH3和NaOH水溶液中的共沉淀行为。

To establish a new chemical experiment for superheavy elements, we have developed a method to rapidly prepare a coprecipitated sample with Sm hydroxide which has good energy resolution in alpha spectrometry. For coprecipitation study of element 104, Rf, we studied coprecipitation behaviors of group 4 elements, Zr, Hf, and Th and also developed an apparatus for rapid preparation of the precipitated samples. Using the developed apparatus, we performed on-line coprecipitation experiments of 85Zr and 169Hf and determined the experimental conditions for Rf. Then, we actually produced 261Rf in the 248Cm(18O, 5n)261Rf reaction with an AVF cyclotron at RIKEN and investigated its coprecipitation behavior in aqueous NH3 and NaOH solutions.