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Existence of long-lived isotopes of a superheavy element in natural Au

A. Marinov·I. Rodushkin·A. Pape·Y. Kashiv·D. Kolb·R. Brandt·R. V. Gentry·H. W. Miller·L. Halicz·I. Segal
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Abstract

Evidence for the existence of long-lived isotopes with atomic mass numbers 261 and 265 and abundance of (1-10)x10$^{-10}$ relative to Au has been found in a study of natural Au using an inductively coupled plasma - sector field mass spectrometer. The measured masses fit the predictions made for the masses of $^{261}$Rg and $^{265}$Rg (Z=111) and for some isotopes of nearby elements. The possibility that these isotopes belong to the recently discovered class of long-lived high spin super- and hyperdeformed isomeric states is discussed.

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A. Marinov, I. Rodushkin, A. Pape, Y. Kashiv, D. Kolb, R. Brandt, R. V. Gentry, H. W. Miller, L. Halicz, I. Segal. 2007-02-25. Existence of long-lived isotopes of a superheavy element in natural Au. https://doi.org/10.1142/s021830130901280x

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