Which of the following is a Alpha emitter?
Alpha (a) radiation: Consists of heavy, positively charged paicles, each of which contains two protons and two neutrons. Alpha Emitters : Americium-241 Plutonium-236 Uranium-238 Thorium-232 Radium-226 Radon-222 Polonium-210 84
Plutonium-236
Carbon-11
Oxygen-15
Samarium -153
Nuclear medicine