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- Q1190176 subject Q8556560.
- Q1190176 subject Q8597501.
- Q1190176 abstract "Naturally occurring zirconium (Zr) is composed of four stable isotopes (of which one may in the future be found radioactive), and one very long-lived radioisotope (96Zr), a primordial nuclide that decays via double beta decay with an observed half-life of 2.0×1019 years; it can also undergo single beta decay, which is not yet observed, but the theoretically predicted value of t1/2 is 2.4×1020 years. The second most stable radioisotope is 93Zr, which has a half-life of 1.53 million years. Twenty-seven other radioisotopes have been observed. All have half-lives less than a day except for 95Zr (64.02 days), 88Zr (63.4 days), and 89Zr (78.41 hours). The primary decay mode is electron capture for isotopes lighter than 92Zr, and the primary mode for heavier isotopes is beta decay.Zirconium is the heaviest element that can be formed from symmetric fusion, from either 45Sc, or 46Ca producing 90Zr (after two beta-plus decays from 90Mo) and 92Zr respectively. All heavier elements are formed either through asymmetric fusion or during the collapse of supernovae. As most of these are energy-absorbing processes, most nuclides of elements heavier than zirconium are theoretically unstable to spontaneous fission, although in many cases, the half-life for this is too long to have been observed. See list of nuclides for a tabulation.Relative atomic mass: 91.224(2).".
- Q1190176 wikiPageExternalLink zirconium-89__2_3_1.html.
- Q1190176 wikiPageExternalLink nudat2.
- Q1190176 wikiPageExternalLink pdf.
- Q1190176 wikiPageExternalLink atomic-weights_revised05.html.
- Q1190176 wikiPageExternalLink pdf.
- Q1190176 wikiPageExternalLink Nubase2003.pdf.
- Q1190176 wikiPageWikiLink Q103531.
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- Q1190176 wikiPageWikiLink Q846110.
- Q1190176 wikiPageWikiLink Q8556560.
- Q1190176 wikiPageWikiLink Q8597501.
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- Q1190176 wikiPageWikiLink Q954828.
- Q1190176 comment "Naturally occurring zirconium (Zr) is composed of four stable isotopes (of which one may in the future be found radioactive), and one very long-lived radioisotope (96Zr), a primordial nuclide that decays via double beta decay with an observed half-life of 2.0×1019 years; it can also undergo single beta decay, which is not yet observed, but the theoretically predicted value of t1/2 is 2.4×1020 years. The second most stable radioisotope is 93Zr, which has a half-life of 1.53 million years.".
- Q1190176 label "Isotopes of zirconium".