Isotopes of rutherfordium

Isotopes of rutherfordium (104Rf)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
261Rf synth 2.1 s SF82%
α18% 257No
263Rf synth 15 min[2] SF<100%?
Preview warning: Infobox Rf isotopes: Decay mode percentage not recognised "perc1=<100%?" cat#%
α~30%?
Preview warning: Infobox Rf isotopes: Decay mode percentage not recognised "perc2=~30%?" cat#%
259No
265Rf synth 1.1 min[3] SF
267Rf synth 48 min[4] SF

Rutherfordium (104Rf) is a synthetic element and thus has no stable isotopes. A standard atomic weight cannot be given. The first isotope to be synthesized was either 259Rf in 1966 or 257Rf in 1969. There are 16 known radioisotopes from 253Rf to 270Rf (3 of which, 266Rf, 268Rf, and 270Rf, are unconfirmed) and several isomers. The longest-lived isotope is 267Rf with a half-life of 48 minutes, and the longest-lived isomer is 263mRf with a half-life of 8 seconds.

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