[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki12\/isotopes-of-fluorine-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki12\/isotopes-of-fluorine-wikipedia\/","headline":"Isotopes of fluorine – Wikipedia","name":"Isotopes of fluorine – Wikipedia","description":"From Wikipedia, the free encyclopedia Nuclides with atomic number of 9 but with different mass numbers Fluorine (9F) has 18","datePublished":"2020-02-28","dateModified":"2020-02-28","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki12\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki12\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/cd810e53c1408c38cc766bc14e7ce26a?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/cd810e53c1408c38cc766bc14e7ce26a?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/11\/book.png","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/11\/book.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki12\/isotopes-of-fluorine-wikipedia\/","wordCount":9503,"articleBody":"From Wikipedia, the free encyclopediaNuclides with atomic number of 9 but with different mass numbersFluorine (9F) has 18 known isotopes ranging from 13F to 31F (with the exception of 30F) and two isomers (18mF and 26mF). Only fluorine-19 is stable and naturally occurring in more than trace quantities; therefore, fluorine is a monoisotopic and mononuclidic element.The longest-lived radioisotope is 18F; it has a half-life of 109.734(8)\u00a0min. All other fluorine isotopes have half-lives of less than a minute, and most of those less than a second. The least stable known isotope is 14F, whose half-life is 500(60)\u00a0yoctoseconds,[4] corresponding to a resonance width of 910(100)\u00a0keV.List of isotopes[edit]Nuclide[5][n 1]ZNIsotopic mass (Da)[6][n 2][n 3]Half-life[n 4]Decaymode[n 5]Daughterisotope[n 6]Spin andparity[n 7][n 4]Natural abundance (mole\u00a0fraction)Excitation energyNormal proportionRange of variation13F[7]9413.045120(540)#p\u00a0?[n 8]12O\u00a0?1\/2+#14F9514.034320(40)500(60)\u00a0ys[910(100)\u00a0keV]p\u00a0?[n 8]13O\u00a0?2\u221215F9615.017785(15)1.1(3)\u00a0zs[376\u00a0keV]p14O1\/2+16F9716.011460(6)21(5)\u00a0zs[21.3(5.1)\u00a0keV]p15O0\u221217F9817.00209524(27)64.370(27)\u00a0s\u03b2+17O5\/2+18F[n 9]9918.0009373(5)109.734(8)\u00a0min\u03b2+18O1+Trace18mF1121.36(15)\u00a0keV162(7)\u00a0nsIT18F5+19F91018.998403162067(883)Stable1\/2+120F91119.99998125(3)11.0062(80)\u00a0s\u03b2\u221220Ne2+21F91220.9999489(19)4.158(20)\u00a0s\u03b2\u221221Ne5\/2+22F91322.002999(13)4.23(4)\u00a0s\u03b2\u2212 (> 89%)22Ne(4+)\u03b2\u2212n (< 11%)21Ne23F91423.003530(40)2.23(14)\u00a0s\u03b2\u2212 (> 86%)23Ne5\/2+\u03b2\u2212n (< 14%)22Ne24F91524.008100(100)384(16)\u00a0ms\u03b2\u2212 (> 94.1%)24Ne3+\u03b2\u2212n (< 5.9%)23Ne25F91625.012170(100)80(9)\u00a0ms\u03b2\u2212 (76.9(4.5)%)25Ne(5\/2+)\u03b2\u2212n (23.1(4.5)%)24Ne\u03b2\u22122n\u00a0?[n 8]23Ne\u00a0?26F91726.020050(110)8.2(9)\u00a0ms\u03b2\u2212 (86.5(4.0)%)26Ne1+\u03b2\u2212n (13.5(4.0)%)25Ne\u03b2\u22122n\u00a0?[n 8]24Ne\u00a0?26mF643.4(1)\u00a0keV2.2(1)\u00a0msIT (82(11)%)26F(4+)\u03b2\u2212n (12(8)%)25Ne\u03b2\u2212\u00a0?[n 8]26Ne\u00a0?27F91827.026980(130)5.0(2)\u00a0ms\u03b2\u2212n (77(21)%)26Ne5\/2+#\u03b2\u2212 (23(21)%)27Ne\u03b2\u22122n\u00a0?[n 8]25Ne\u00a0?28F91928.035860(130)46\u00a0zsn27F(4\u2212)29F92029.043100(560)2.5(3)\u00a0ms\u03b2\u2212n (60(40)%)28Ne(5\/2+)\u03b2\u2212 (40(40)%)29Ne\u03b2\u22122n\u00a0?[n 8]27Ne\u00a0?31F92231.06020(570)#2\u00a0ms# [> 260\u00a0ns]\u03b2\u2212\u00a0?[n 8]31Ne\u00a0?5\/2+#\u03b2\u2212n\u00a0?[n 8]30Ne\u00a0?\u03b2\u22122n\u00a0?[n 8]29Ne\u00a0?This table header & footer: ^ mF\u00a0\u2013 Excited nuclear isomer.^ (\u2009)\u00a0\u2013 Uncertainty (1\u03c3) is given in concise form in parentheses after the corresponding last digits.^ #\u00a0\u2013 Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).^ a b #\u00a0\u2013 Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).^ Modes of decay:^ Bold symbol as daughter\u00a0\u2013 Daughter product is stable.^ (\u2009) spin value\u00a0\u2013 Indicates spin with weak assignment arguments.^ a b c d e f g h i j Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide.^ Has medicinal usesFluorine-18[edit]Of the unstable nuclides of fluorine, 18F has the longest half-life, 109.734(8)\u00a0min. It decays to 18O via \u03b2+ decay. For this reason 18F is a commercially important source of positrons. Its major value is in the production of the radiopharmaceutical fludeoxyglucose, used in positron emission tomography in medicine.Fluorine-18 is the lightest unstable nuclide with equal odd numbers of protons and neutrons, having 9 of each. (See also the “magic numbers” discussion of nuclide stability.)[8]Fluorine-19[edit]Fluorine-19 is the only stable isotope of fluorine. Its abundance is 100%; no other isotopes of fluorine exist in significant quantities. Its binding energy is 147801.3648(38)\u00a0keV. Fluorine-19 is NMR-active with a spin of 1\/2+, so it is used in fluorine-19 NMR spectroscopy.Fluorine-20[edit]Fluorine-20 is an unstable isotope of fluorine. It has a half-life of 11.0062(80)\u00a0s and decays via beta decay to the stable nuclide 20Ne. Its specific radioactivity is 1.8693(14)\u00d710+21\u00a0Bq\/g and has a mean lifetime of 15.879(12)\u00a0s.Fluorine-21[edit]Fluorine-21, as with fluorine-20, is also an unstable isotope of fluorine. It has a half-life of 4.158(20)\u00a0s. It undergoes beta decay as well, decaying to 21Ne, which is a stable nuclide. Its specific activity is 4.781(23)\u00d710+21\u00a0Bq\/g.Isomers[edit]Only two nuclear isomers (long-lived excited nuclear states), fluorine-18m and fluorine-26m, have been characterized.[4] The half-life of 18mF before it undergoes isomeric transition is 162(7)\u00a0nanoseconds.[4] This is less than the decay half-life of any of the fluorine radioisotope nuclear ground states except for mass numbers 14\u201316, 28, and 31. [9] The half-life of 26mF is 2.2(1)\u00a0milliseconds; it decays mainly to its ground state of 26F or (rarely, via beta-minus decay) to one of high excited states of 26Ne with delayed neutron emission.[4]External links[edit]References[edit]^ “Standard Atomic Weights: Fluorine”. CIAAW. 2021.^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et\u00a0al. (2022-05-04). “Standard atomic weights of the elements 2021 (IUPAC Technical Report)”. Pure and Applied Chemistry. doi:10.1515\/pac-2019-0603. ISSN\u00a01365-3075.^ a b c d Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). “The NUBASE2020 evaluation of nuclear properties” (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088\/1674-1137\/abddae. ^ Half-life, decay mode, nuclear spin, and isotopic composition is sourced in:Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). “The NUBASE2020 evaluation of nuclear properties” (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088\/1674-1137\/abddae.^ Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). “The AME 2020 atomic mass evaluation (II). Tables, graphs and references*”. Chinese Physics C. 45 (3): 030003. doi:10.1088\/1674-1137\/abddaf.^ Charity, R. J. (2 April 2021). “Observation of the Exotic Isotope 13 F Located Four Neutrons beyond the Proton Drip Line”. Physical Review Letters. 126 (13): 2501. doi:10.1103\/PhysRevLett.126.132501. OSTI\u00a01773500. PMID\u00a033861136. S2CID\u00a0233259561. Retrieved 5 April 2021.^ National Nuclear Data Center. “NuDat 2.x database”. Brookhaven National Laboratory.^ Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). “The NUBASE2016 evaluation of nuclear properties” (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088\/1674-1137\/41\/3\/030001. 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