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Publication

Synthesis of a new element with atomic number Z=117...

Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
142502
Volume
104
Issue
14

The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes
293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk. Decay chains involving eleven 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 super-heavy nuclei.