Isotopes of ununoctium

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Ununoctium (Uuo) was only very recently synthesized; all data are theoretical. It has no stable isotopes. A standard atomic mass cannot be given.

Contents

[edit] Table

nuclide
symbol		 Z(p) N(n)  
isotopic mass (u)
 		 half-life nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
293Uuo 118 175 293.21467(129)#
294Uuo 118 176

[edit] Notes

  • Values marked # are not purely derived from experimental data, but at least partly from systematic trends.
  • Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values from Ame2003 denote one standard deviation. Values from IUPAC are expanded uncertainties.

[edit] Theoretical

Theoretical calculations done on the synthetic pathways for, and the half-life of, other isotopes have shown that some could be slightly more stable than the synthesized isotope 294Uuo, most likely 293Uuo, 295Uuo, 296Uuo, 297Uuo, 298Uuo, 300Uuo and 302Uuo.[1][2][2] Of these, 297Uuo, might provide the best chances for obtaining longer-lived nuclei,[1][2] and thus might become the focus of future work with this element. Some isotopes with much more neutrons, such as some located around 313Uuo, could also provide longer-lived nuclei.[3]

[edit] References

  • Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
  1. ^ a b P. Roy Chowdhury, C. Samanta, and D. N. Basu (January 2006). "α decay half-lives of new superheavy elements". Phys. Rev. C 73: 014612. 
  2. ^ a b c C. Samanta, P. Roy Chowdhury and D. N. Basu (April 2007). "Predictions of alpha decay half lives of heavy and superheavy elements". Nuclear Physics A 789: 142–154. 
  3. ^ S B Duarte, O A P Tavares, M Gonçalves, O Rodríguez, F Guzmán, T N Barbosa, F García and A Dimarco (2004). "Half-life predictions for decay modes of superheavy nuclei". J. Phys. G: Nucl. Part. Phys. 30: 1487–1494. doi:10.1088/0954-3899/30/10/014. 
Isotopes of ununseptium Isotopes of ununoctium Isotopes of ununennium
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