| The Gesellschaft fur Schwerionenforschung mbH (GSI, Institute for Heavy Ion Research) in the Wixhausen section of Darmstadt, Germany is a federally funded heavy ion research center. |
| The laboratory performs basic and applied research in physics and related natural science disciplines. Main fields of study include plasma physics, atomic physics, nuclear structure research and medical research. |
| The lab has discovered the following elements; Meitnerium (1982), Hassium (1984), Darmstadtium (1994), Roentgenium (1994), Ununbium (1996). |