A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead. 一种存在周期短的放射性金属元素,由铀形成,能分裂成锕(Ac)然后分裂成铅。
A radioactive element of the alkali-metal group discovered as a disintegration product of actinium. 【化】镧系(即稀土元素)一种碱金属属的放射性元素,是锕(Ac)瓦解的产物。
Other radioactive elements have been discovered since : actinium, radiothorium and mesothorium, ionium, etc. 自那以后发现的其他放射性元素有:锄、放射性钍和新针、镍,等等。
The removal of radioactivity from lanthanum oxide ii. a study on the extraction separation of lanthanum and actinium by some conventional organophosphorous extractants 氧化镧中放射性的去除&Ⅱ.几种常用有机磷萃取剂对镧和锕(Ac)的萃取分离研究
With q deformed three parameter formula, the ground rotational bands of 29 even even rare earth and actinium nuclei have been calculated, and the fitting parameters have been analyzed. 利用q变形三参数公式,计算了锕(Ac)系和稀土偶偶核基带转动谱,详细分析了拟合参数值呈现出的规律性。