Nikolas
Created page with "== Radiation physics == <section begin="oncology1" /> * Types of radiation used ** Natural radiation (due to radioactive decay) *** Alpha radiation (two protons and two neutrons) *** Beta radiation (high-energy electrons) **** Electrons (beta radiation) has low penetration power, so beta radiation is only suitable for treating tumours near the skin surface ** Gamma radiation (high-energy photons) *** Photon radiation (gamma and X-ray radiation) has high penetration power..."