Isotopes
| Isotope |
Half-life |
Decay mode |
Discovery year |
Reaction |
|---|---|---|---|---|
| 253Rf | 000000048 !48 μs | α, SF | 1994 | 204Pb(50Ti,n) |
| 254Rf | 000000023 !23 μs | SF | 1994 | 206Pb(50Ti,2n) |
| 255Rf | 00023 !2.3 s | ε?, α, SF | 1974 | 207Pb(50Ti,2n) |
| 256Rf | 0000064 !6.4 ms | α, SF | 1974 | 208Pb(50Ti,2n) |
| 257Rf | 00047 !4.7 s | ε, α, SF | 1969 | 249Cf(12C,4n) |
| 257mRf | 00041 !4.1 s | ε, α, SF | 1969 | 249Cf(12C,4n) |
| 258Rf | 0000147 !14.7 ms | α, SF | 1969 | 249Cf(13C,4n) |
| 259Rf | 00032 !3.2 s | α, SF | 1969 | 249Cf(13C,3n) |
| 259mRf | 00025 !2.5 s | ε | 1969 | 249Cf(13C,3n) |
| 260Rf | 000021 !21 ms | α, SF | 1969 | 248Cm(16O,4n) |
| 261Rf | 00013 !78 s | α, SF | 1970 | 248Cm(18O,5n) |
| 261mRf | 00004 !4 s | ε, α, SF | 2001 | 244Pu(22Ne,5n) |
| 262Rf | 00023 !2.3 s | α, SF | 1996 | 244Pu(22Ne,4n) |
| 263Rf | 015 !15 min | α, SF | 1999 | 263Db(e−,ν e) |
| 263mRf ? | 000080 !8 s | α, SF | 1999 | 263Db(e−,ν e) |
| 264Rf | 060 !1? h | α ? | unknown | — |
| 265Rf | 0025 !2.5 min | SF | 2010 | 269Sg(—,α) |
| 266Rf | 600 !10 h ? | α, SF ? | 2007? | 266Db(e−,ν e)? |
| 267Rf | 080 !1.3 h | SF | 2004 | 271Sg(—,α) |
| 268Rf | 360 !6 h ? | α, SF ? | 2004? | 268Db(e−,ν e)? |
Rutherfordium has no stable or naturally-occurring isotopes. Several radioactive isotopes have been synthesized in the laboratory, either by fusing two atoms or by observing the decay of heavier elements. Fifteen different isotopes have been reported with atomic masses from 253 to 268 (with the exception of 264). Most of these decay predominantly through spontaneous fission pathways.
Read more about this topic: Rutherfordium