Apart from alpha, beta, and gamma radiation you can also encounter neutron radiation. Which means a stream of energetic neutrons that can both damage molecules, AND have a potential to transmute atoms into their radioactive isotope that will, sooner or later, decay and relase another dose of radiation of some kind. They can also cause some materials to become brittle by damaging some of atoms ( neutron activation leading to decay, leaving either an open space or another atom in its place, with different qualities) in the crystalline structure (thus, creating weakspots) – this is called neutron embrittlement.
Latest Answers