Isotopes of dubnium

Isotopes of dubnium (₁₀₅Db)
SF33%	–
α41%	259Lr
ε3%	263mRf
ε	266Rf
ε	268Rf
α	264Lr
α83%	266Lr
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Dubnium (₁₀₅Db) is a synthetic element, thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was ²⁶¹Db in 1968. Thirteen radioisotopes are known, ranging from ²⁵⁵Db to ²⁷⁰Db (except ²⁶⁴Db, ²⁶⁵Db, and ²⁶⁹Db), along with one isomer (^257mDb); two more isomers have been reported but are unconfirmed. The longest-lived known isotope is ²⁶⁸Db with a half-life of 16 hours.

^ 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.
^ Münzenberg, G.; Gupta, M. (2011). "Production and Identification of Transactinide Elements". Handbook of Nuclear Chemistry. Springer. p. 877. doi:10.1007/978-1-4419-0720-2_19.
^ ^a ^b Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010
^ ^a ^b Oganessian, Yu. Ts.; Utyonkov, V. K.; Kovrizhnykh, N. D.; et al. (2022). "New isotope ²⁸⁶Mc produced in the ²⁴³Am+⁴⁸Ca reaction". Physical Review C. 106 (064306). doi:10.1103/PhysRevC.106.064306.
^ ^a ^b Oganessian, Yu. Ts.; Utyonkov, V. K.; Kovrizhnykh, N. D.; et al. (29 September 2022). "First experiment at the Super Heavy Element Factory: High cross section of ²⁸⁸Mc in the²⁴³Am+⁴⁸Ca reaction and identification of the new isotope ²⁶⁴Lr". Physical Review C. 106 (3): L031301. doi:10.1103/PhysRevC.106.L031301. S2CID 252628992.
^ Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr". Physical Review Letters. 112 (17): 172501. Bibcode:2014PhRvL.112q2501K. doi:10.1103/PhysRevLett.112.172501. hdl:1885/148814. PMID 24836239. S2CID 5949620.

[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] Münzenberg, G.; Gupta, M. (2011). "Production and Identification of Transactinide Elements". Handbook of Nuclear Chemistry. Springer. p. 877. doi:10.1007/978-1-4419-0720-2_19.

[lifetimes-3] Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010

[Mc2022-4] Oganessian, Yu. Ts.; Utyonkov, V. K.; Kovrizhnykh, N. D.; et al. (2022). "New isotope ²⁸⁶Mc produced in the ²⁴³Am+⁴⁸Ca reaction". Physical Review C. 106 (064306). doi:10.1103/PhysRevC.106.064306.

[SHEfactory0922-5] Oganessian, Yu. Ts.; Utyonkov, V. K.; Kovrizhnykh, N. D.; et al. (29 September 2022). "First experiment at the Super Heavy Element Factory: High cross section of ²⁸⁸Mc in the²⁴³Am+⁴⁸Ca reaction and identification of the new isotope ²⁶⁴Lr". Physical Review C. 106 (3): L031301. doi:10.1103/PhysRevC.106.L031301. S2CID 252628992.

[270Db-Khuyagbaatar-6] Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr". Physical Review Letters. 112 (17): 172501. Bibcode:2014PhRvL.112q2501K. doi:10.1103/PhysRevLett.112.172501. hdl:1885/148814. PMID 24836239. S2CID 5949620.

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