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Dubnium Properties


All Dubnium properties were studies only with single atoms of 261Db (T1/2 = 1.8 seconds). The first information of Dubnium chemical properties were identified by I. Zvara and coworkers in 1970 in USSR/Russia. In these experiments, Dubnium atoms, synthesized as described earlier (243Am(22Ne, 4n)261Db) were slow down in a stream on N2 at 300°C with addition of gaseous chloride-rich compounds - TiCl4 and SOCl2 with subsequent analysis in thermochromatographic column. In total 18 atoms of Dubnium were detected, these atoms were adsorbed between Hafnium and Niobium.

In 1977 Dubnium was detected in the USA by L-edge X-Ray radiation of element 103 synthesized by α-decay on 260Db (T1/2 = 1.5 seconds).

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