注3：锕充足比率可用于测量恒星的年龄。
Note3: Actinide abundance ratios may be applied to measurements of stellar ages.
这些元素都有放射性，而且性质与锕相似。
All are radioactive and have similar properties to actinium.
锕合成很快，在这种环境下，因为超新星爆炸。
Actinides are synthesized very quickly in such environments as supernova explosions.
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.
稀土元素也称镧系元素，化学性质与锕族元素(89到104)相似。
Rare earths, also called lanthanides, are chemically similar to actinides (89 through 104).
锕射气氡的一种放射性的，惰性的和气态的同位素，其半衰期为3。92秒。
A radioactive, inert, gaseous isotope of radon, with a half - life of3.92seconds.
通过分析和计算锕系核裂变截面和全套中子反应截面获取了一组锕系核的裂变位垒参数。
The fission barrier parameters for actinide nuclei were obtained by analysis and calculations of fission cross-sections and complete neutron reaction cross sections.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
研究了富钙钛锆石型和富烧绿石型两种人造岩石固化体包容锕系核素的配方设计和固化产品的鉴定评价，包括物理性能、抗浸出性能和耐辐照性能。
The designed formulae for solidification of actinides were given, and the properties of the waste form, like physical properties, durability properties and irradiation properties, were evaluated.
研究了富钙钛锆石型和富烧绿石型两种人造岩石固化体包容锕系核素的配方设计和固化产品的鉴定评价，包括物理性能、抗浸出性能和耐辐照性能。
The designed formulae for solidification of actinides were given, and the properties of the waste form, like physical properties, durability properties and irradiation properties, were evaluated.
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