Isotopes of ununoctium

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

Table

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.

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.citejournal|journal=Phys. Rev. C|volume=73|pages=014612|year=2006|title=α decay half-lives of new superheavy elements|author=P. Roy Chowdhury, C. Samanta, and D. N. Basu|month=January|day=26|url=http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRVCAN000073000001014612000001&idtype=cvips&gifs=yes|accessdate=2008-01-18}|accessdate=2008-01-18] citejournal|journal=Nuclear Physics A|volume=789|year=2007|pages=142–154|title=Predictions of alpha decay half lives of heavy and superheavy elements|author=C. Samanta, P. Roy Chowdhury and D. N. Basu|month=April|day=06|url=http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVB-4NF4F0Y-2&_user=2065684&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000056005&_version=1&_urlVersion=0&_userid=2065684&md5=a7b8cfc55f85298f22e07132052c819b|accessdate=2008-01-18|doi=10.1016/j.nuclphysa.2007.04.001] citejournal|journal=Nuclear Physics A|volume=730|year=2004|pages=355–376|title=Entrance channels and alpha decay half-lives of the heaviest elements|author=G. Royer, K. Zbiri, C. Bonilla|url=http://www.sciencedirect.com/science?_ob=HelpURL&_file=doi.htm&_acct=C000050264&_version=1&_urlVersion=0&_userid=1010281&md5=13bb1bdf5aa5237890160b7f2b89a049|doi=10.1016/j.nuclphysa.2003.11.010|accessdate=2008-01-18] Of these, ²⁹⁷Uuo, might provide the best chances for obtaining longer-lived nuclei, 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. [citejournal|title=Half-life predictions for decay modes of superheavy nuclei|year=2004|journal=J. Phys. G: Nucl. Part. Phys.|volume=30|pages=1487–1494|doi=10.1088/0954-3899/30/10/014|author=S B Duarte, O A P Tavares, M Gonçalves, O Rodríguez, F Guzmán, T N Barbosa, F García and A Dimarco|url=http://www.iop.org/EJ/abstract/0954-3899/30/10/014/|accessdate=2008-01-18]

References

* Isotope masses from [http://www.nndc.bnl.gov/amdc/index.html Ame2003 Atomic Mass Evaluation] by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in "Nuclear Physics" A729 (2003).