Determination of the activity coefficient of Am in liquid Al by electrochemical methods
Determination of the activity coefficient of Am in liquid Al by electrochemical methods
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DOI：
10.1016/j.jnucmat.2009.07.002
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发表时间：
2009-09
影响因子：
3.1
通讯作者：
G. Córdoba;A. Laplace;O. Conocar;J. Lacquement
中科院分区：
文献类型：
--
作者：
G. Córdoba;A. Laplace;O. Conocar;J. Lacquement
采用电化学方法测定了液态铝中镅的活度系数。据作者所知，这是该值首次在公开文献中发表。出于辐射安全原因，仅允许在手套箱内操作 100 毫克的这种高放射性元素。因此，设计了一种“临时”实验装置，允许使用少量溶剂。 Am(III) 溶液是通过将 AmO2 直接溶解到 CaCl2–NaCl 中制备的；在 600°C 下通过碳氯化 (Cl2+C) 转化为氯化物形式。在获得的 CaCl2-NaCl-AmCl3 溶液中进行循环伏安技术，可以首次估计活度系数的对数，在 700°C 下等于 logγAm(Al)=-6.7±1。
The activity coefficient of americium in liquid aluminium has been determined by electrochemical methods. To the author’s knowledge, this is the first time this value is published in the open literature. For radiation safety reasons only 100mg of this highly radioactive element were permitted to be manipulated inside the glove-box. Hence an “ad hoc” experimental set-up, which allows working with small amounts of solvent, has been designed. The Am(III) solution has been prepared by direct AmO2dissolution into CaCl2–NaCl; the conversion into its chloride form has been achieved by carbochlorination (Cl2+C) at 600°C. Cyclic voltammetry technique, performed in the obtained CaCl2–NaCl–AmCl3solution, has allowed a first estimation for the logarithm of the activity coefficient, being equal to logγAm(Al)=-6.7±1 at 700°C.