Dubnium

The discovery of this element is disputed by the Institute of Dubna (Russia) and the University of Berkeley teams.

It appears that it was first prepared independently by the two research teams through collision experiences similar to those that produced Rutherfordium (element 104). In 1967, Flerov reported the existence of element 105, at the Joint Research Institute in Russia, involving collision reactions between Am 243 ions and Ne 22 ions. Later, in 1970, Ghiorso and his co-workers synthesized dubnium at the University of Berkeley (California) in the USA. This method involved the collision of Cf 249 ions with N 15 ions.

This element was named Dubnium (Db) in honor to the Dubna laboratory, in Russia.

See also: Properties: Isotopes