radioactive half life

The numerical methods used in analysing the experimental decay data of synthesizing a new heavy neutron rich isotope 239 Pa are studied, and its half life is obtained by analysing the decays of a radioactive series for the first time.

根据合成239Pa实验的特定条件，利用递次衰变关系首次确定了丰中子新核素239Pa的半衰期。

A radioactive, inert, gaseous isotope of radon, with a half-life of 3.92 seconds.

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.

A radioactive, inert, gaseous isotope of radon a half-life of 3.92 seconds.

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.

We don't know what astatine looks like, because, as Lowe put it, "that stuff just doesn't want to exist." It's so radioactive ( with a half-life measured in hours) that any large piece of it would be quickly vaporized by its own heat.

我们不知道砹看上去是什么样子的，正如劳维所说：“这玩意儿根本就是不想存在。”砹具有极强的放射性（半衰期以小时计算），任何一块稍微大一点儿的砹块都会被自身衰变释放出来的热量气化掉。

Determination of the half life for a new nuclide 239 pa by analyzing the decays of a radioactive series

利用递次衰变关系确定新核素~（239）Pa的半衰期