铀系(uranium series)是三个天然放射系(钍系、铀系、锕系)之一。又称4n+2系。又称铀镭系。它们的半衰期长短不一,最长的如铀-238,为4.5×109年,最短的如钋-214为1.6×10-4秒。放出的有a射线或β射线,有些核素并伴有γ射线。其中的某些核素若造成内照射会严重地危害人体组织。
锕铀系 actinouranium family ; uranium actinium series ; actinium uranium series ; actinium-uranittm series
零功率铀系统 zero energy uranium system
铀系元素 uranoid ; uranides
铀系法 uranium-series dating method ; U-series ; uranium series method
铀系法测年 uranium series dating
铀系不平衡法 uranium disequilibrium dating method
铀系定年 uranium series dating ; Uranium series dating technique
铀系年龄标准物质 SampIe of Uranium-Series Method Dating ; SampIe of Uranium-Series Method
铀系列同位素 uranium series isotope
有三个天然存在的放射系列,即钍系、锕系和铀系。
There are three naturally occurring radioactive series - the thorium series, the actinium series, and the uranium series.
铀系不平衡定年技术是第四纪年轻年代学的重要定年手段。
Uranium series dating technique is the important means of Quaternary chronology.
氡是天然放射性惰性气体,是铀系衰变链中的一个衰变产物。
As a product from the uranium disintegration, radon is a natural radioactive idle gas.
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