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- Isotopes_of_xenon abstract "Naturally occurring xenon (Xe) is made of eight stable isotopes. (124Xe, 126Xe, and 134Xe are predicted to undergo double beta decay, but this has never been observed in these isotopes, so they are considered to be stable.) Xenon has the second highest number of stable isotopes. Only tin, with 10 stable isotopes, has more. Beyond these stable forms, there are over 30 unstable isotopes and isomers that have been studied, the longest-lived of which is 136Xe which undergoes double beta decay with a half-life of 2.38 ± 0.02 ± 0.14×1021 years with the next longest lived being 127Xe with a half-life of 36.345 days. Of known isomers, the longest-lived is 131mXe with a half-life of 11.934 days. 129Xe is produced by beta decay of 129I (half-life: 16 million years); 131mXe, 133Xe, 133mXe, and 135Xe are some of the fission products of both 235U and 239Pu, and therefore used as indicators of nuclear explosions.The artificial isotope 135Xe is of considerable significance in the operation of nuclear fission reactors. 135Xe has a huge cross section for thermal neutrons, 2.65×106 barns, so it acts as a neutron absorber or "poison" that can slow or stop the chain reaction after a period of operation. This was discovered in the earliest nuclear reactors built by the American Manhattan Project for plutonium production. Fortunately the designers had made provisions in the design to increase the reactor's reactivity (the number of neutrons per fission that go on to fission other atoms of nuclear fuel).Relatively high concentrations of radioactive xenon isotopes are also found emanating from nuclear reactors due to the release of this fission gas from cracked fuel rods or fissioning of uranium in cooling water. The concentrations of these isotopes are still usually low compared to the naturally occurring radioactive noble gas 222Rn.Because xenon is a tracer for two parent isotopes, Xe isotope ratios in meteorites are a powerful tool for studying the formation of the solar system. The I-Xe method of dating gives the time elapsed between nucleosynthesis and the condensation of a solid object from the solar nebula (Xenon being a gas, only that part of it which formed after condensation will be present inside the object). Xenon isotopes are also a powerful tool for understanding terrestrial differentiation. Excess 129Xe found in carbon dioxide well gases from New Mexico was believed to be from the decay of mantle-derived gases soon after Earth's formation.Standard atomic mass: 131.293(6) uAll other isotopes have half-lives less than 12 days, most less than 20 hours. The shortest-lived isotope is 148Xe with a half-life of 408 ns. Its 41 isotopes have mass numbers ranging from 108 to 148.108Xe (disc. 2011) is the second heaviest nuclide with equal numbers of protons and neutrons, after 112Ba.".
- Isotopes_of_xenon wikiPageExternalLink masseval.html.
- Isotopes_of_xenon wikiPageExternalLink pdf.
- Isotopes_of_xenon wikiPageExternalLink atomic-weights_revised05.html.
- Isotopes_of_xenon wikiPageExternalLink pdf.
- Isotopes_of_xenon wikiPageExternalLink Nubase2003.pdf.
- Isotopes_of_xenon wikiPageExternalLink nudat2.
- Isotopes_of_xenon wikiPageID "2526952".
- Isotopes_of_xenon wikiPageRevisionID "602437046".
- Isotopes_of_xenon abundance "syn".
- Isotopes_of_xenon background "cyan".
- Isotopes_of_xenon decayEnergy "0.427".
- Isotopes_of_xenon decayMass "133".
- Isotopes_of_xenon decayMode Beta_decay.
- Isotopes_of_xenon decayProduct "Caesium-133".
- Isotopes_of_xenon decaySymbol "Cs".
- Isotopes_of_xenon element "xenon".
- Isotopes_of_xenon halflife "452995.20000000007".
- Isotopes_of_xenon hasPhotoCollection Isotopes_of_xenon.
- Isotopes_of_xenon heavier "Isotopes of caesium".
- Isotopes_of_xenon lighter "Isotopes of iodine".
- Isotopes_of_xenon mass "132.9059107".
- Isotopes_of_xenon massNumber "133".
- Isotopes_of_xenon nameAndSymbol "Xenon-133, 133Xe".
- Isotopes_of_xenon numNeutrons "79".
- Isotopes_of_xenon numProtons "54".
- Isotopes_of_xenon spin "3".
- Isotopes_of_xenon symbol "Xe".
- Isotopes_of_xenon subject Category:Isotopes_of_xenon.
- Isotopes_of_xenon subject Category:Lists_of_isotopes_by_element.
- Isotopes_of_xenon subject Category:Xenon.
- Isotopes_of_xenon type Abstraction100002137.
- Isotopes_of_xenon type Atom114619225.
- Isotopes_of_xenon type Isotope114619658.
- Isotopes_of_xenon type IsotopesOfXenon.
- Isotopes_of_xenon type Matter100020827.
- Isotopes_of_xenon type Part113809207.
- Isotopes_of_xenon type PhysicalEntity100001930.
- Isotopes_of_xenon type Relation100031921.
- Isotopes_of_xenon type Substance100019613.
- Isotopes_of_xenon comment "Naturally occurring xenon (Xe) is made of eight stable isotopes. (124Xe, 126Xe, and 134Xe are predicted to undergo double beta decay, but this has never been observed in these isotopes, so they are considered to be stable.) Xenon has the second highest number of stable isotopes. Only tin, with 10 stable isotopes, has more.".
- Isotopes_of_xenon label "Isotopen van xenon".
- Isotopes_of_xenon label "Isotopes du xénon".
- Isotopes_of_xenon label "Isotopes of xenon".
- Isotopes_of_xenon label "Изотопы ксенона".
- Isotopes_of_xenon label "キセノンの同位体".
- Isotopes_of_xenon label "氙的同位素".
- Isotopes_of_xenon sameAs Anexo:Isótopos_de_xenón.
- Isotopes_of_xenon sameAs Isotopes_du_xénon.
- Isotopes_of_xenon sameAs キセノンの同位体.
- Isotopes_of_xenon sameAs 제논_동위_원소.
- Isotopes_of_xenon sameAs Isotopen_van_xenon.
- Isotopes_of_xenon sameAs m.0642t27.
- Isotopes_of_xenon sameAs Q606986.
- Isotopes_of_xenon sameAs Q606986.
- Isotopes_of_xenon sameAs Isotopes_of_xenon.
- Isotopes_of_xenon wasDerivedFrom Isotopes_of_xenon?oldid=602437046.
- Isotopes_of_xenon isPrimaryTopicOf Isotopes_of_xenon.