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Carbon-11 or 11 C is a radioactive isotope of mass 11 of the element carbon, which has a half-life of about 20, 5 minutes decays to boron-11. The atomic nucleus of the nuclide is made up of 5 neutrons and the 6 element-specific protons.
Carbon-11 or 11 C is a radioactive isotope of carbon that decays to boron-11. This decay mainly occurs due to positron emission, with around 0.19–0.23% of decays instead occurring by electron capture. [6] [7] It has a half-life of 20.3402(53) min. 11 C → 11 B + e + + ν e + 0.96 MeV 11 C + e − → 11 B + ν e + 1.98 MeV
Isotope data for carbon-11 in the Periodic Table. Click any isotope in diagram to see its data. Detailed decay information for the isotope carbon-11 including decay chains and daughter products.
The carbon isotope C-11 is used as a radioisotope in positron emission tomography: [11 C]DASB and others. Carbon-14. C-14 - also known as radiocarbon - is the radioactive carbon isotope contained in small traces (1:1 trillion) in natural carbon.
3 kwi 2019 · This can easily be understood by considering that the ratio between the total mass of a 11 C-labeled precursor (carbon-12 and carbon-11) and the precursor for labeling typically is in the order of 1/100.
For a given number of atoms, isotopes with shorter half-lives decay more rapidly, undergoing a greater number of radioactive decays per unit time than do isotopes with longer half-lives. The half-lives of several isotopes are listed in Table 14.5.1, along with some of their applications.
13 cze 2023 · The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope. For example, cobalt-60, an isotope that emits gamma rays used to treat cancer, has a half-life of 5.27 years (Figure \(\PageIndex{1}\)).
