全部

1·The theory of alpha decay utilizes this model.

衰变理论用了这种模型。

2·The first type discovered -- alpha decay -- is when a radioactive particle emits a Helium nucleus !

我们发现的第一种衰变方式——阿尔法衰变——是放射性粒子产生氦分子！

3·The radioactive displacement law of Fajans and Soddy was formulated to describe the products of alpha and beta decay.

法扬斯和索迪的放射性位移定律被用来描述α和β衰变的产物。

4·Alpha particles are these helium nuclei, and they are the result of radioactive decay.

阿尔法粒子是氦核，它们是放射性衰变的产物。

5·As radon progeny decay, they emit radioactive alpha particles and attach to aerosols, dust and other particles in the air.

氡子核在衰变时发射出放射性阿尔法粒子，这些粒子可附着于空气中的浮质、灰尘及其它粒子。

6·Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.

粒子是从天然放射性蜕变得到的带正电的氦核。

7·These radionuclides undergo radioactive decay, by emitting harmful alpha particles, beta particles or gamma rays.

它们在衰变期间会放出对人体有害的粒子粒子或射线。