unstable nucleus
英 [ʌnˈsteɪbl ˈnjuːkliəs]
美 [ʌnˈsteɪbl ˈnuːkliəs]
网络 核素
双语例句
- Any of three processes of radioactive disintegration in which a Beta particle is spontaneously emitted by an unstable atomic nucleus in order to dissipate excess energy.
某些不稳定原子核为耗散其过剩能量而自发发射一个β粒子的三种放射性衰变过程的统称。 - Radioactive series: Any of four sets of unstable heavy atomic nuclei that undergo a series of alpha decay and Beta decay until a stable nucleus is achieved.
放射性系：四组不稳定的重原子核，通过一系列α衰变和β衰变直至达到稳定的核为止。