Synthesis of a New Element with Atomic Number Z=117

TitleSynthesis of a New Element with Atomic Number Z=117
Publication TypeJournal Article
Year of Publication2010
AuthorsOganessian, Yu. Ts., Abdullin Sh. F., Bailey P. D., Benker D. E., Bennett M. E., Dmitriev S. N., Ezold J. G., Hamilton J. H., Henderson R. A., Itkis M. G., Lobanov Yu. V., Mezentsev A. N., Moody K. J., Nelson S. L., Polyakov A. N., Porter C. E., Ramayya A. V., Riley F. D., Roberto J. B., Ryabinin M. A., Rykaczewski K. P., Sagaidak R. N., Shaughnessy D. A., Shirokovsky I. V., Stoyer M. A., Subbotin V. G., and Sudowe R.
JournalPhys. Rev. Lett.
Date PublishedApr/2010
KeywordsAnalytical chemistry, Nuclear chemistry, Russian Federation, ununseptium, USA
Short TitleSynthesis of a New Element with Atomic Number Z=117
Citation KeyPhysRevLett.104.142502
Full Text

The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk. Decay chains involving 11 new nuclei were identified by means of the Dubna gas-filled recoil separator. The measured decay properties show a strong rise of stability for heavier isotopes with Z≥111, validating the concept of the long sought island of enhanced stability for superheavy nuclei.

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