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Carbon-11 or 11 C is a radioactive isotope of carbon that decays to boron-11. ... It is produced by hitting nitrogen with protons of around 16.5 MeV in a cyclotron.
The darker more stable isotope region departs from the line of protons (Z) = neutrons (N), as the element number Z becomes larger. This is a list of chemical elements by the stability of their isotopes. Of the first 82 elements in the periodic table, 80 have isotopes considered to be stable. [1] Overall, there are 251 known stable isotopes in ...
A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus, for example, carbon-13 with 6 protons and 7 neutrons. The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, whereas the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear.
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
A table or chart of nuclides is a two-dimensional graph of isotopes of the elements, in which one axis represents the number of neutrons (symbol N) and the other represents the number of protons (atomic number, symbol Z) in the atomic nucleus. Each point plotted on the graph thus represents a nuclide of a known or hypothetical chemical element.
Boron-8 is an isotope of boron that undergoes β + decay to beryllium-8 with a half-life of 771.9(9) ms.It is the strongest candidate for a halo nucleus with a loosely-bound proton, in contrast to neutron halo nuclei such as lithium-11.
The energy emitted depends on the isotope that is decaying; the figure of 0.96 MeV applies only to the decay of carbon-11. The short-lived positron emitting isotopes 11 C (T 1 ⁄ 2 = 20.4 min ), 13 N (T 1 ⁄ 2 = 10 min ), 15 O (T 1 ⁄ 2 = 2 min ), and 18 F (T 1 ⁄ 2 = 110 min ) used for positron emission tomography are typically produced by ...
Isotopes are nuclides having the same number of protons: e.g. carbon-12 and carbon-13. Isobars are nuclides having the same mass number (i.e. sum of protons plus neutrons): e.g. carbon-12 and boron-12. Nuclear isomers are different excited states of the same type of nucleus.