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रदरफोर्डियम एक रासायनिक तत्व है। इसका अर्धायु काल ~१.३ घंटे का होता है।
रदरफोर्डियम / Rutherfordium रासायनिक तत्व | |
नमूना | |
रासायनिक चिन्ह: | Rf |
परमाणु संख्या: | 104 |
रासायनिक शृंखला: | संक्रमण धातु |
आवर्त सारणी में स्थिति | |
अन्य भाषाओं में नाम: | Rutherfordium (अंग्रेज़ी) |
Isotope | Half-life [1] | Decay mode[1] | Discovery year | Reaction |
---|---|---|---|---|
253Rf | 48 μs | α, SF | 1994 | 204Pb(50Ti,n)[2] |
254Rf | 23 μs | SF | 1994 | 206Pb(50Ti,2n)[2] |
255Rf | 2.3 s | ε?, α, SF | 1974 | 207Pb(50Ti,2n)[3] |
256Rf | 6.4 ms | α, SF | 1974 | 208Pb(50Ti,2n)[3] |
257Rf | 4.7 s | ε, α, SF | 1969 | 249Cf(12C,4n)[4] |
257mRf | 4.1 s | ε, α, SF | 1969 | 249Cf(12C,4n)[4] |
258Rf | 14.7 ms | α, SF | 1969 | 249Cf(13C,4n)[4] |
259Rf | 3.2 s | α, SF | 1969 | 249Cf(13C,3n)[4] |
259mRf | 2.5 s | ε | 1969 | 249Cf(13C,3n)[4] |
260Rf | 21 ms | α, SF | 1969 | 248Cm(16O,4n)[5] |
261Rf | 78 s | α, SF | 1970 | 248Cm(18O,5n)[6] |
261mRf | 4 s | ε, α, SF | 2001 | 244Pu(22Ne,5n)[7] |
262Rf | 2.3 s | α, SF | 1996 | 244Pu(22Ne,4n)[8] |
263Rf | 15 min | α, SF | 1999 | 263Db([[साँचा:SubatomicParticle/link|e⁻]],[[साँचा:SubatomicParticle/link|νe]])[9] |
263mRf ? | 8 s | α, SF | 1999 | 263Db([[साँचा:SubatomicParticle/link|e⁻]],[[साँचा:SubatomicParticle/link|νe]])[9] |
265Rf | 1.1 min[10] | SF | 2010 | 269Sg(—,α)[11] |
266Rf | 23 s? | SF | 2007? | 266Db([[साँचा:SubatomicParticle/link|e⁻]],[[साँचा:SubatomicParticle/link|νe]])?[12][13] |
267Rf | 1.3 h | SF | 2004 | 271Sg(—,α)[14] |
268Rf | 1.4 s? | SF | 2004? | 268Db([[साँचा:SubatomicParticle/link|e⁻]],[[साँचा:SubatomicParticle/link|νe]])?[13][15] |
270Rf | 20 ms?[16] | SF | 2010? | 270Db([[साँचा:SubatomicParticle/link|e⁻]],[[साँचा:SubatomicParticle/link|νe]])?[17] |
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. Sixteen different isotopes have been reported with atomic masses from 253 to 270 (with the exceptions of 264 and 269). Most of these decay predominantly through spontaneous fission pathways.[1][18]
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