Search results
A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays. Every chemical element has one or more ...
- Videos
Dive into Britannica’s video collection, where you’ll find...
- Samarium-148
Other articles where samarium-148 is discussed: samarium: 0...
- Lutetium-176
Other articles where lutetium-176 is discussed: lutetium: 4...
- Nuclear Medicine
Nuclear medicine, medical specialty that involves the use of...
- Ulcer
Ulcer, a lesion or sore on the skin or mucous membrane...
- Isotopic Tracer
Isotopic tracer, any radioactive atom detectable in a...
- Transuranium Element
Ask the Chatbot a Question Ask the Chatbot a Question...
- Radon
Radon, chemical element, a heavy radioactive gas of Group 18...
- Videos
30 lip 2020 · Radioisotopes are the unstable form of an element that emit radiation to transform into a more stable form. Radiation is easily traceable and can cause changes in the substance it falls upon. These special attributes make radioisotopes useful in medicine, industry and other areas.
6 mar 2008 · The most common method of producing radioisotopes is by neutron activation in a nuclear reactor; this involves the capture of a neutron by a nucleus which leads to an excess of neutrons (a neutron-rich atom).
What are radioisotopes? Each atomic element knows exactly how many protons and neutrons it needs at its centre (nucleus) in order to be stable (stay in its elemental form). Radioisotopes are atomic elements that do not have the correct proton to neutron ratio to remain stable.
30 kwi 2024 · The most common radioisotope used in diagnosis is technetium-99 (Tc-99m) accounting for about 80% of all nuclear medicine procedures and 85% of diagnostic scans in nuclear medicine worldwide. In developed countries (about one-quarter of world population) the frequency of diagnostic nuclear medicine is about 2% per year, and the frequency of ...
The table below provides information about common radioactive isotopes. Isotopes are forms of an element that have the same number of protons (positively charged particles) but different numbers of neutrons (neutral particles) in their nuclei.
Radioisotopes are used as tracers using their radioactivity for detection. Radioactivity is detected by liquid scintillation counting or autoradio (lumino)graphy beta imaging technique.7 Experiments using radioisotopes are usually performed under the regional regulation as handling radionuclide.
