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'''Rutherfordium''' ({{pronEng|ˌrʌðɚˈfɔrdiəm}}) iku sawijining [[unsur kimia]] jroning [[Tabel périodik]] kanthi simbul '''Rf''' lan [[nomer atom]] [[104]].
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===<sup>248</sup>Cm(<sup>18</sup>O,xn)<sup>266-x</sup>Rf (x=3?,5)===
This reaction was first studied in 1970 by Albert Ghiorso at the Lawrence Berkeley National Laboratory (LBNL). The team identified <sup>261</sup>Rf in the 5n channel using the method of correlation of genetic parent-daughter decays. A half-life of 65 s was determined.
<ref name=70Gh01>[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-473DDK8-15&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f50dd21999d4152c92b105d7e4656634 "<sup>261</sup>Rf; new isotope of element 104"], '''Ghiorso et al.''', ''Phys. Lett. 32B'', 1970 , 2, Pages 95-98. Retrieved on [[2008-03-04]]</ref>
A repeat later that year using cation exchange chromatography indicated that the product did not form a +2 or +3 cation and behaved as eka-hafnium.
A study of the properties of rutherfordium isotopes was performed in 1981 at the LBNL. In a series of reactions, a 1.5 s SF activity was identified and assigned to a fermium descendant although later evidence indicates a possible assignment to <sup>262</sup>Rf.
| <sup>268</sup>Rf (manawa EC saka <sup>268</sup>Db)
|-
| <sup>291</sup>116 , <sup>287</sup>114 , <sup>283</sup>112
| <sup>267</sup>Rf
|-
| <sup>262</sup>Rf (possibly <sup>262m</sup>Rf)
|-
| <sup>277</sup>112 , <sup>273</sup>Ds , <sup>269</sup>Hs , <sup>265</sup>Sg
| <sup>261m</sup>Rf , <sup>261</sup>Rf
|-
| <sup>271</sup>Ds , <sup>267</sup>Hs , <sup>263</sup>Sg
| <sup>259</sup>Rf
|-
| <sup>269</sup>Ds , <sup>265</sup>Hs , <sup>261</sup>Sg
| <sup>257</sup>Rf
|-
| <sup>264</sup>Hs , <sup>260</sup>Sg
| <sup>256</sup>Rf
|-
| <sup>208</sup>Pb
| <sup>258</sup>Rf
| '''38.0 nb , 17.0 MeV'''
| '''12.3 nb , 21.5 MeV'''
| '''660 pb , 29.0 MeV'''
|-
| <sup>50</sup>Ti
| <sup>206</sup>Pb
| <sup>256</sup>Rf
| 800 pb , 21.5 MeV
| 2.4 nb , 21.5 MeV
|
|-
| <sup>204</sup>Pb
| <sup>254</sup>Rf
| 190 pb , 15.6 MeV
|
|
| <sup>208</sup>Pb
| <sup>256</sup>Rf
| '''380 pb , 17.0 MeV'''
|
|
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