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Synthesis of a New Element with Atomic Number Z=117

Yu. Ts. Oganessian et al.
Phys. Rev. Lett. 104, 142502 – Published 9 April 2010
Physics logo See Viewpoint: Exploring the island of superheavy elements
An article within the collection: Transuranium Elements and the Physical Review

Abstract

The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 129317 and 129417 were produced in fusion reactions between Ca48 and Bk249. Decay chains involving 11 new nuclei were identified by means of the Dubna gas-filled recoil separator. The measured decay properties show a strong rise of stability for heavier isotopes with Z111, validating the concept of the long sought island of enhanced stability for superheavy nuclei.

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  • Received 15 March 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.142502

©2010 American Physical Society

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This article appears in the following collection:

Transuranium Elements and the Physical Review

This collection marks the 150th anniversary of Dmitri Mendeleev’s discovery of the Periodic Table of Elements.

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Exploring the island of superheavy elements

Published 9 April 2010

A collaboration of Russian and US physicists has created the superheavy element 117, an experimental achievement that fills in the final gap on the list of observed elements up to element 118.

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Vol. 104, Iss. 14 — 9 April 2010

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