Darmstadtium team proposed the name "becquerelium" after Henri Becquerel. The American team in 1997 proposed the name "hahnium" after Otto Hahn (previously this name had been used for element 105). The name "darmstadtium" (Ds) was suggested by the GSI team in honor of the city of Darmstadt, where the element was discovered. The GSI team originally also considered naming the element "wixhausium", after the suburb of Darmstadt known as Wixhausen where the element was discovered, but eventually decided on "darmstadtium". The new name was officially recommended by IUPAC on August 16, 2003. Darmstadtium has no stable or naturally occurring isotopes. Several
Otto Hahn in all Warsaw pact states. In January 1958, Otto Hahn, together with his friend Albert Schweitzer signed the Pauling Appeal to the United Nations in New York for the "immediate conclusion of an international agreement to stop the testing of nuclear weapons". In October, together with Clement Attlee, Edgar Faure, Tetsu Katayama, et al. he signed the international "Agreement to call a meeting to draw up a world constitution". Since 1958, Hahn was sending messages to the annual conferences of the recently founded "Japan Council Against A and H Bombs" in Tokyo. In 1960, for instance, he wrote to president