Isotopes of zirconium

Isotopes of zirconium (₄₀Zr)
γ	–
β+	89Y
γ	–
Standard atomic weight Ar°(Zr)
	91.224±0.002; 91.224±0.002 (abridged);
	view; talk; edit;

Naturally occurring zirconium (₄₀Zr) 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;^[5] it can also undergo single beta decay, which is not yet observed, but the theoretically predicted value of t_1/2 is 2.4×10²⁰ years.^[6] The second most stable radioisotope is ⁹³Zr, which has a half-life of 1.53 million years. Thirty other radioisotopes have been observed. All have half-lives less than a day except for ⁹⁵Zr (64.02 days), ⁸⁸Zr (83.4 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.

^ 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.
^ Pritychenko, Boris; Tretyak, V. "Adopted Double Beta Decay Data". National Nuclear Data Center. Retrieved 2008-02-11.
^ "Standard Atomic Weights: Zirconium". CIAAW. 1983.
^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
^ "List of Adopted Double Beta (ββ) Decay Values". National Nuclear Data Center, Brookhaven National Laboratory.
^ H Heiskanen; M T Mustonen; J Suhonen (30 March 2007). "Theoretical half-life for beta decay of ⁹⁶Zr". Journal of Physics G: Nuclear and Particle Physics. 34 (5): 837–843. doi:10.1088/0954-3899/34/5/005.

[NUBASE2020-1] 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.

[2] Pritychenko, Boris; Tretyak, V. "Adopted Double Beta Decay Data". National Nuclear Data Center. Retrieved 2008-02-11.

[3] "Standard Atomic Weights: Zirconium". CIAAW. 1983.

[CIAAW2021-4] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[5] "List of Adopted Double Beta (ββ) Decay Values". National Nuclear Data Center, Brookhaven National Laboratory.

[6] H Heiskanen; M T Mustonen; J Suhonen (30 March 2007). "Theoretical half-life for beta decay of ⁹⁶Zr". Journal of Physics G: Nuclear and Particle Physics. 34 (5): 837–843. doi:10.1088/0954-3899/34/5/005.

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