γ-decay – high energy (hundreds of keV or more) photons are emitted.β-decay – where electrons or positrons ( particles with the same mass as electrons, but with a charge exactly opposite to that of an electron) are emitted.α-decay –a helium nucleus ( 4 2He) is emitted.There are three types of radioactive decays in nature: Radioactivity – Types of Radioactive Decay.Subsequent experiments show that radioactivity is a nuclear phenomenon which occurs when an unstable nucleus undergoes a decay. This meant that something was emitted by the compound which penetrated the silver and black paper and hit the plate. When he developed the photographic plate, he found that there was blackening on the plate. Next, he wrapped these pieces in black paper and separated it from a photographic plate by a piece of silver. He illuminated some pieces of Uranium-Potassium-Sulphate with visible light.
0 Comments
Leave a Reply. |