SPECTRUM

Chemical Fact Sheet

Darmstadtium

Chemical Abstract Number (CAS #) 54083-77-1
Analytical Methods 200.8 - 6020
Atomic Symbol Ds

Synopsis from the CRC Handbook of Chemistry and Physics 92nd Edition 2011-2013

Darmstadtium (Darmstadt, city in Germany), Ds. In 1987 Oganessian et al., at Dubna, claimed discovery of this element. Their experiments indicated the spontaneous fissioning nuclide 272110 with a half-life of 10 ms. More recently a group led by Armbruster at G.S.I. in Darmstadt, Germany, reported evidence of 269110, which was produced by bombarding lead for many days with more than 1018 nickel atoms. A detector searched each collision for Element 110s distinct decay sequence. On November 9, 1994, evidence of 110 was detected. In 2003 IUPAC approved the name darmstadtium, symbol Ds, for Element 110. Seven isotopes of Element 110 are now recognized.
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