Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha, beta, and gamma decay. The weak force is the mechanism that is responsible for beta ...
Radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei. Radioactive decay is a property of several naturally occurring elements as well as of artificially produced isotopes of the elements.
The three main types of radioactive decay are alpha, beta, and gamma decay, but there are other nuclear reactions responsible for radioactivity. Here is a look at the definition of radioactivity, its units, the types of radioactive decay, and how radioactivity penetrates matter.
Through this process — called radioactive decay — radioisotopes lose their radioactivity over time. This gradual loss of radioactivity is measured in half-lives. Essentially, a half-life of a radioactive material is the time it takes one-half of the atoms of a radioisotope to decay by emitting radiation.
DOE Explains...Radioactivity Science Highlight: Advancing Understanding of Radioactive Heavy Elements at the Edge of the Periodic Table Scientific terms can be confusing. DOE Explains offers straightforward explanations of key words and concepts in fundamental science. It also describes how these concepts apply to the work that the Department of Energy’s Office of Science conducts as it ...
Medical Applications of Radioactive Elements Radioactive elements have revolutionized medicine in ways once unimaginable. In nuclear medicine, radioactive isotopes are used to diagnose and treat various conditions. For diagnosis, technetium-99m is widely used in imaging organs.