# 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)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.
Document type :
Preprints, Working Papers, ...

http://hal.in2p3.fr/in2p3-00138060
Contributor : Béatrice Forrler <>
Submitted on : Friday, March 23, 2007 - 10:50:39 AM
Last modification on : Friday, May 8, 2020 - 1:10:04 AM

### Citation

A. Marinov, I. Rodushkin, A. Pape, Y. Kashiv, D. Kolb, et al.. Existence of long-lived isotopes of a superheavy element in natural Au. 2007. ⟨in2p3-00138060⟩

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