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找寻锕放射系的祖先,前后共經历了30年(1906—1935)。这是各个放射系中最难发現的核种之一,它的搜索方法在放射性研究中具有极为广泛的代表性。元素镤的发現是这搜索过程的副产物。最后采用了当时最先进的技术——貭譜分析,才肯定了锕放射系的祖先是U~(235)或称锕鈾,找到了人类获得和运用原子能的最初的“火种”。
Looking for the ancestral actinide radioactive lines, before and after a total of 30 years (1906-1935). This is one of the most difficult to find nuclear species in various radioactive lines and its search method is extremely broadly representative in radiological research. The discovery of the element 镤 is a by-product of this search process. Finally, using the most advanced technology of the time - spectrum analysis, it was affirmed that the ancestor of the actinide radioactive system is U ~ (235) or actinidium uranium, and found the first “fire” that mankind obtained and used atomic energy.