Glossary R
Deutsch: Strahlung / Español: Radiación / Português: Radiação / Français: Rayonnement / Italiano: Radiazione
In physics, radiation is a process in which energetic particles or energetic waves travel through a vacuum, or through matter-containing media that are not required for their propagation. Waves of a mass filled medium itself, such as water waves or sound waves, are usually not considered to be forms of "radiation" in this sense.
Deutsch: Radioaktivität / Español: Radiactividad / Português: Radioatividade / Français: Radioactivitê ©/ Italiano: Radioattività
Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting ionizing radiation. A material that spontaneously emits this kind of radiation — which includes the emission of alpha particles, beta particles, gamma rays and conversion electrons — is considered radioactive.
Deutsch: Radionuklid / Español: Radioisótopo / Português: Radioisótopo / Français: Radioisotope / Italiano: Radionuclide
A radioisotope in the environmental context refers to a radioactive isotope of an element that naturally occurs or is artificially produced. These isotopes undergo radioactive decay, emitting radiation in the form of alpha particles, beta particles, or gamma rays. Radioisotopes have both beneficial and potentially harmful impacts on the environment and human health. They are used in a wide range of applications, including medical treatments, power generation, and as tracers in environmental and geological research to study processes such as water movement, soil erosion, and the age of geological formations.
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