Dubnium
Dubnio (Db, Z=105)
- Date
- 1968 · confidence medium
- Place
- Dubna, Russia (JINR)
- Credited to
- Georgy Flyorov (Dubna) and Albert Ghiorso (Berkeley)
- People
- 👤 Albert Ghiorso1915–2010👤 Georgi Fliórov1913–1990
- Field
- Matter & energy
⚠️ Disputed: the sources disagree.
What was discovered
Dubna claimed it in 1968 by bombarding americium with neon (nielsbohrium); Berkeley in 1970 with californium and nitrogen (hahnium). The final name honours Dubna (1997).
Called hahnium in Western literature for decades.
What it led to
- Only transfermium element named after a Russian laboratory
- Studies of dubnium halide chemistry
- End of the 1994-1997 naming dispute
Built on
- U-300 cyclotron
- HILAC
Made possible
- Transactinide chemistry by gas chromatography