Search results
17 wrz 2019 · Stable isotopes are non-radioactive forms of atoms that have unique properties for various applications. Learn how the IAEA assists Member States in using isotope-based techniques in hydrology, environmental studies, agriculture and more.
- Radioisotopes
Of the 118 elements listed in the periodic table, only 94...
- Guidelines for Sediment Tracing Using The Compound Specific Carbon Stable Isotope Technique
This publication is intended to support the proper use of...
- Publications
International Atomic Energy Agency. Vienna International...
- Stable Isotope Technique to Assess Intake of Human Milk in Breastfed Infants
The stable (non-radioactive) isotope technique has been...
- Radiopharmaceutical Production
Radiopharmaceuticals contain small amounts of radioisotopes...
- Rice Production Guidelines: Best Farm Management Practices and The Role of Isotopic Techniques
Monitoring Stable Nitrogen and Oxygen Isotope Compositions...
- News|More News
News about the IAEA's work, including press releases, impact...
- Events
The IAEA hosts and participates in a wide range of events...
- Radioisotopes
What are Stable Isotopes? The nucleus of each atom contains protons and neutrons. While the number of protons defines the element (e.g., hydrogen, carbon, etc.) and the sum of the protons and neutrons gives the atomic mass, the number of neutrons defines the isotope of that element.
Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay. [1] .
Although most of the known elements have at least one isotope whose atomic nucleus is stable indefinitely, all elements have isotopes that are unstable and disintegrate, or decay, at measurable rates by emitting radiation. Some elements have no stable isotopes and eventually decay to other elements.
In nuclear reactions, it is the nucleus of the atom that gains stability by undergoing a change of some kind. Some elements have no stable isotopes, which means that any atom of that element is radioactive. For some other elements, only certain isotopes are radioactive.
Definitions. • Isotopes are atoms that contain the same number of protons but differ in the number of neutrons. !m/m. 1.00. The difference in masses among stable isotopes is relatively larger for smaller mass atoms.
Stable isotopes are specific forms of elements that have the same number of protons but different numbers of neutrons in their nucleus. These isotopes have different atomic weights but maintain the same atomic number.
