Rutherfordium
Isotopes

Rutherfordium

Section Title: Isotopes
Table Section Text: None

Isotope	Half-life	Decay mode	Discovery year	Reaction

253Rf	48 μs	α, SF	1994	204Pb(50Ti,n)

254Rf	23 μs	SF	1994	206Pb(50Ti,2n)

255Rf	2.3 s	ε?, α, SF	1974	207Pb(50Ti,2n)

256Rf	6.4 ms	α, SF	1974	208Pb(50Ti,2n)

257Rf	4.7 s	ε, α, SF	1969	249Cf(12C,4n)

257mRf	4.1 s	ε, α, SF	1969	249Cf(12C,4n)

258Rf	14.7 ms	α, SF	1969	249Cf(13C,4n)

259Rf	3.2 s	α, SF	1969	249Cf(13C,3n)

259mRf	2.5 s	ε	1969	249Cf(13C,3n)

260Rf	21 ms	α, SF	1969	248Cm(16O,4n)

261Rf	78 s	α, SF	1970	248Cm(18O,5n)

261mRf	4 s	ε, α, SF	2001	244Pu(22Ne,5n)

262Rf	2.3 s	α, SF	1996	244Pu(22Ne,4n)

263Rf	15 min	α, SF	1999	263Db( e−, ν e)

263mRf ?	8 s	α, SF	1999	263Db( e−, ν e)

265Rf	1.1 min	SF	2010	269Sg(—,α)

266Rf	23 s?	SF	2007?	266Db( e−, ν e)?

267Rf	1.3 h	SF	2004	271Sg(—,α)

268Rf	1.4 s?	SF	2004?	268Db( e−, ν e)?

270Rf	20 ms?	SF	2010?	270Db( e−, ν e)?

Sentence(s)

Sixteen different isotopes have been reported from 253 to 270 (with the exceptions of 264 and 269).
Sixteen different isotopes have been reported with atomic masses from 253 to 270 (with the exceptions of 264 and 269).

final_sentence: Sixteen different isotopes have been reported from 253 to 270 (with the exceptions of 264 and 269).
final_sentence: Sixteen different isotopes have been reported with atomic masses from 253 to 270 (with the exceptions of 264 and 269).