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.

4 pages, 3 figures, 2 tables

References in corpus (3)

• Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes
• New Outlook on the Possible Existence of Superheavy Elements in Nature
• Coherent Description for Hitherto Unexplained Radioactivities by Super- and Hyperdeformed Isomeric States

Cited by in corpus (9)

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• Superdeformed and Hyperdeformed States in Z=122 Isotopes
• Search for long-lived superheavy eka-tungsten with radiopure ZnWO${}_4$ crystal scintillator
• Enrichment of the Superheavy Element Rg in Natural Au
• ICP-SFMS search for long-lived naturally-occurring heavy, superheavy and superactinide nuclei compared to AMS experiments
• Response to "Discovery of the element with atomic number 112" by Robert C. Barber, Heinz W. Gaggeler, Paul J. Karol, Hiromichi Nakahara, Emanuele Vardaci and Erich Vogt (PAC-REP-08-03-05)
• Superheavy elements: existence, classification and experiment