Synthesis of a New Element with Atomic Number Z=117

Title	Synthesis of a New Element with Atomic Number Z=117
Publication Type	Journal Article
Year of Publication	2010
Authors	Oganessian, 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.
Journal	Phys. Rev. Lett.
Volume	104
Pagination	142502
Date Published	Apr/2010
Keywords	Analytical chemistry, Nuclear chemistry, Russian Federation, ununseptium, USA
URL	http://link.aps.org/doi/10.1103/PhysRevLett.104.142502
DOI	10.1103/PhysRevLett.104.142502
Short Title	Synthesis of a New Element with Atomic Number Z=117
Citation Key	PhysRevLett.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.