Chemistry Nexus

by WebElements: the periodic table on the web

It is claimed that recent experimental results involving the bomabardment of americium-243 with calcium-48 ions are consistent with the formation in the laboratory of a few atoms of elements 113 and 115. In experiments conducted at the JINR U400 cyclotron with the Dubna gas-filled separator between July 14 and Aug. 10, 2003, atomic decay patterns were observed that are said to confirm the existence of element 115 and element 113. In these decay chains, element 113 is produced via the alpha decay of element 115.1

Abstract:1 tantalising evidence of two new chemical elements has been produced by a team of Russian and American scientists. Their observations indicate that we may be getting close to the fabled ‘island of stability’ in the periodic table, where heavy elements should be more stable than their neighbours.

The news has been picked up in a number of online sources including Nature and elsewhere.


1. Oganessian, Yu. Ts., V. K. Utyonkov, Yu. V. Lobanov, F. Sh. Abdullin, A. N. Polyakov, I. V. Shirokovsky, Yu. S. Tsyganov, et al., “Publisher’s Note: Experiments on the synthesis of element 115 in the reaction  Am 243 ( Ca 48 , x n ) 115 291 − x“, Phys. Rev. C., 2004, 69, 029902,

December 14th, 2009

Posted In: Chemistry

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