Isotopes of rutherfordium

Isotopes of rutherfordium (104Rf)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
261mRf synth 1.2 min α 257No
263Rf synth 15 min SF –
265Rf synth 1.3 min[2] SF –
267Rf synth 48 min[3] 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 17 known radioisotopes from 252Rf to 270Rf (three 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 261mRf with a half-life of 74 seconds.

  1. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  2. ^ Kovrizhnykh, N.D. "On the way to the synthesis of new elements: 119 and 120" (PDF). Retrieved 1 June 2025.
  3. ^ Oganessian, Yu. Ts.; Utyonkov, V. K.; Ibadullayev, D.; et al. (2022). "Investigation of 48Ca-induced reactions with 242Pu and 238U targets at the JINR Superheavy Element Factory". Physical Review C. 106 (24612): 024612. Bibcode:2022PhRvC.106b4612O. doi:10.1103/PhysRevC.106.024612. S2CID 251759318.
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