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

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

2007-02-25

arxiv.org/abs/nucl-ex/0702051v1

Int. J. Mod. Phys. E 18 (2009) 621-629

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 3 figures, 2 tables

Scientific paper

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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