Ununpentium

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Ununpentium is an artificial chemical element. The name is according to IUPAC rules for a systematic element name of the atomic number 115 ( from Latin unus ' one ' (2 × ) and Greek pente, five ') and is up to the name by the first explorers provisional. It is also called Eka - bismuth.

Synthesis

On 1 February 2004, reported in a paper in Physical Review C on the synthesis of Ununpentium by a working group of Russian scientists from Dubna and American scientists at the Lawrence Livermore National Laboratory. In the experiment, to have incurred and decay within a fraction of a second to Ununtrium four atoms Ununpentium. The name is so far only preliminary and only means the order number in Greco-Latin number words.

On 31 January 2006 it was announced that Swiss researchers were able to produce a refined methodology, by bombarding americium with a disk of calcium atoms, 15 Ununpentium atoms. This they identified by their decay product Dubnium. The decay chain also includes the element Ununtrium so that this could also be detected.

On August 27, 2013, researchers announced the University of Lund, have also observed the element 115 at GSI. Analogous to the Swiss group was doing bombarded americium with calcium.