Radioactive alpha decay. Animation of a nucleus of polonium-218 decaying to lead-214 by emitting an alpha particle. An alpha particle is a high-energy helium nucleus, composed of two protons (red) and two neutrons (yellow). Alpha particles can only travel a short distance before being stopped, but are very damaging to body tissues within range, due to their relatively high mass. Polonium-218 has a half life of 3.1 minutes, and forms part of the decay chain of naturally-occurring uranium-238. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / Equinox Graphics |
Model Release : | Non requis |
Property release : | Non requis |
Durée : | 14 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |