阿尔法粒子 meaning in English
alpha particles
Examples
- Over 25 isotopes of polonium are known , with atomic masses ranging from 192 to 218 . polonium - 210 , the predominant isotope of polonium , is radioactive and emits alpha particles on decay
现时已知道钋元素有25个同位素，它们的质量数由192至218 ，钋210是当中显著的一个同位素，具放射性特徵，会释出放射性阿尔法粒子。 - The alpha particles released from polonium - 210 have a very low penetrating power and can be stopped easily by the outer layer of skin or a sheet of paper . it is unlikely that the particles can affect human body through direct irradiation . however the ionization power of alpha particles is very high
钋210释放的阿尔法粒子穿透能力很弱，人类的皮肤或一张纸已能隔阻它，粒子经照射影响人体的机会很微，不过由于它的电离能力很强，如果人类吸入或进食含有钋210的物质，其释放的阿尔法粒子就能直接破坏内脏细胞，即使所吸收的份量不多，也会损害身体健康，急性高剂量阿尔法辐射可以引致辐射中毒。