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Existence of Long-Lived Isotopes of a Superheavy Element in Natural Au

Abstract : 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 states exist in these isotopes. The hypothesis that they belong to a new class of long-lived high spin super- and hyperdeformed isomeric states is discussed
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http://hal.in2p3.fr/in2p3-00389813
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Submitted on : Friday, May 29, 2009 - 4:39:09 PM
Last modification on : Friday, May 8, 2020 - 1:10:34 AM

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A. Marinov, I. Rodushkin, A. Pape, Y. Kashiv, D. Kolb, et al.. Existence of Long-Lived Isotopes of a Superheavy Element in Natural Au. International Journal of Modern Physics E, World Scientific Publishing, 2009, 18, pp.621-629. ⟨10.1142/S021830130901280X⟩. ⟨in2p3-00389813⟩

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