Synthesis of a new element with atomic number Z = 117.

@article{Oganessian2010SynthesisOA,
  title={Synthesis of a new element with atomic number Z = 117.},
  author={Y. Oganessian and F. Abdullin and P. D. Bailey and D. Benker and M. Bennett and S. Dmitriev and J. Ezold and J. Hamilton and R. Henderson and M. Itkis and Y. V. Lobanov and A. Mezentsev and K. Moody and S. Nelson and A. Polyakov and C. E. Porter and A. Ramayya and F. D. Riley and J. Roberto and M. Ryabinin and K. Rykaczewski and R. Sagaidak and D. Shaughnessy and I. V. Shirokovsky and M. Stoyer and V. Subbotin and R. Sudowe and A. Sukhov and Y. Tsyganov and V. Utyonkov and A. Voinov and G. K. Vostokin and P. Wilk},
  journal={Physical review letters},
  year={2010},
  volume={104 14},
  pages={
          142502
        }
}
The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes (293)117 and (294)117 were produced in fusion reactions between (48)Ca and (249)Bk. 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 > or = 111, validating the concept of the long sought island of enhanced stability for superheavy nuclei. 
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