Discovery of element 117: Super-heavy elements and the “island of stability”

Roberto, James B.; Rykaczewski, Krzysztof Piotr

doi:10.1080/01496395.2017.1290658

Title: Discovery of element 117: Super-heavy elements and the “island of stability”

Journal Article · Wed Apr 12 00:00:00 EDT 2017 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496395.2017.1290658· OSTI ID:1408011

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Element 117 (tennessine) joined the periodic table in November 2016. Two tennessine isotopes were synthesized by bombarding ²⁴⁹Bk from Oak Ridge National Laboratory with ⁴⁸Ca ions at the Joint Institute of Nuclear Research, Russia, and 11 new heaviest isotopes of odd-Z elements were observed in subsequent decay chains. These isotopes exhibit increasing lifetimes as the closed nuclear shell at neutron number N = 184 is approached, providing evidence for the “island of stability” for super-heavy elements. Here, this article summarizes recent super-heavy element research with a focus on element 117, the role of actinide targets, and opportunities to synthesize elements 119 and 120.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Actinide; berkelium; separations chemistry; super-heavy element; tennessine

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1408011

Journal Information:: Separation Science and Technology, Vol. 52, Issue 10; ISSN 0149-6395

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (19)

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Title: Discovery of element 117: Super-heavy elements and the “island of stability”

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