Peter Armbruster
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Peter Armbruster is a scientist at the Gesellschaft für Schwerionenforschung (GSI) facility in Germany and is credited with discovering elements 110 (darmstadtium), 111 (roentgenium), 112 (ununbium), 114 (ununquadium), and 116 (ununhexium).
Sources
Jefferson Lab (http://education.jlab.org)