Isotopes of dubnium
Chronology of isotope discovery

Isotopes of dubnium

Section Title: Chronology of isotope discovery
Table Section Text: None

Isotope	Year discovered	discovery reaction

255Db	1977	207Pb(51V,3n)

256Db	1983?, 2000	209Bi(50Ti,3n)

257Dbg	1985	209Bi(50Ti,2n)

257Dbm	1985	209Bi(50Ti,2n)

258Db	1976?, 1981	209Bi(50Ti,n)

259Db	2001	241Am(22Ne,4n)

260Db	1970	249Cf(15N,4n)

261Db	1971	249Bk(16O,4n)

262Db	1971	249Bk(18O,5n)

263Db	1971?, 1990	249Bk(18O,4n)

264Db	unknown

265Db	unknown

266Db	2006	237Np(48Ca,3n)

267Db	2003	243Am(48Ca,4n)

268Db	2003	243Am(48Ca,3n)

269Db	unknown

270Db	2009	249Bk(48Ca,3n)

Sentence(s)

The isotope ²⁶⁰Db was discovered from ²⁴⁹Cf(¹⁵N,xn)264−xDb (x=4) in 1970.

final_sentence: The isotope ²⁶⁰Db was discovered from ²⁴⁹Cf(¹⁵N,xn)264−xDb (x=4) in 1970.