EXISTENCE OF LONG-LIVED ISOTOPES OF A SUPERHEAVY ELEMENT IN NATURAL Au

@article{Marinov2009EXISTENCEOL,
  title={EXISTENCE OF LONG-LIVED ISOTOPES OF A SUPERHEAVY ELEMENT IN NATURAL Au},
  author={A. Marinov and I. Rodushkin and A. Pape and Yoav Kashiv and Dietmar Kolb and Reinhard Brandt and R. V. Gentry and H. W. Miller and Ludwik Halicz and Irina Segal},
  journal={International Journal of Modern Physics E-nuclear Physics},
  year={2009},
  volume={18},
  pages={621-629}
}
Evidence for the existence of long-lived isotopes with atomic mass numbers 261 and 265, and abundance of (1-10)×10-10 relative to Au, has been found in a study of natural Au using inductively coupled plasma-sector field mass spectrometry. The measured masses match the predictions for the masses of 261Rg and 265Rg(Z=111), and those of some isobars of nearby elements. Based on chemical arguments, it is proposed that they are most probably isotopes of Rg. It is deduced that long-lived isomeric… Expand
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