Uranisotoper
Hovedartikkel: Uran
Alle uran-isotopene er ustabile (og dermed radioaktive). Totalt 26 isotoper og 3 isomerer er kjent. Isomerer er eksiterte isotoper som går tilbake til grunnformen ved intern omdannelse.
Forklaring til isotop-tabellen:
N – Antall nøytroner i kjernen. Like nøytron-tall er bosoner, og ulike er fermioner.
S – Spinn
T1/2 – Halveringstid
% – Prosentvis andel av naturlig forekomst.
| Isotop | % | Atommasse (u) | T1/2 | N | Henfall | Henfallsprodukt | Sluttprodukt | Bindingsenergi | S |
|---|---|---|---|---|---|---|---|---|---|
| 217U | 0% | 217,024368791 | 26 ms | 125 | α | 213Th | 205Tl, 201Hg, 197Au | 7,635026 MeV | 1/2 |
| 218U | 0% | 218,023535671 | 6 ms | 126 | α | 214Th | 202Hg, 206Pb, 198Hg | 7,640587 MeV | 0 |
| 219U | 0% | 219,02491916 | 55 µs | 127 | α, β+ | 215Th, 219Pa | 207Pb, 203Tl, 199Hg | 7,636669 MeV | 9/2 |
| 220U | 0% | 220,024723 | 60 ns | 128 | α, β+ | 216Th, 220Pa | 200Hg, 208Pb | 7,639 MeV | 0 |
| 221U | 0% | 221,026399 | 0,7 µs | 129 | α, β+ | 217Th, 221Pa | 205Tl, 201Hg | 7,634 MeV | 9/2 |
| 222U | 0% | 222,026086 | 1,4 µs | 130 | α, β+ | 218Th, 222Pa | 206Pb, 202Hg, 198Hg | 7,638 MeV | 0 |
| 223U | 0% | 223,0277386 | 21 µs | 131 | α, β+ | 219Th, 223Pa | 207Pb, 203Tl | 7,632688 MeV | 7/2 |
| 224U | 0% | 224,027604778 | 0,94 ms | 132 | α, β+ | 220Th, 224Pa | 208Pb, 206Pb, 200Hg | 7,635203 MeV | 0 |
| 225U | 0% | 225,029390717 | 61 ms | 133 | α | 221Th | 205Tl | 7,629747 MeV | 5/2 |
| 226U | 0% | 226,029338702 | 269 ms | 134 | α | 222Th | 206Pb | 7,631916 MeV | 0 |
| 227U | 0% | 227,031156367 | 1,1 minutt | 135 | α, β+ | 223Th, 227Pa | 207Pb | 7,626393 MeV | 3/2 |
| 228U | 0% | 228,031374006 | 9,167 minutt | 136 | α, ε | 224Th, 228Pa | 208Pb, 206Pb | 7,627455 MeV | 0 |
| 229U | 0% | 229,033505939 | 0,972 timer | 137 | α, β+ | 229Pa, 225Th | 205Tl, 207Pb | 7,620721 MeV | 3/2 |
| 230U | 0% | 230,033939784 | 20,8 døgn | 138 | α, 2β+, SF | 226Th, 230Th, 208Pb | 206Pb, 208Pb, 205Tl | 7,620923 MeV | 0 |
| 231U | 0% | 231,036293704 | 4,17 døgn | 139 | ε, α | 231Pa, 227Th | 207Pb, 205Tl, 208Pb | 7,613381 MeV | 5/2 |
| 232U | 0% | 232,037156152 | 68,81 år | 140 | α, SF | 228Th, 208Pb, 204Hg | 208Pb, 206Pb, 200Hg | 7,611892 MeV | 0 |
| 233U | 0% | 233,039635207 | 1,5931 × 105 år | 141 | α, SF | 229Th, 209Pb, 205Hg | 205Tl, 207Pb | 7,603953 MeV | 5/2 |
| 234U | 0,0055% | 234,040952088 | 2,4566 × 105 år | 142 | α, SF | 230Th, 206Hg, 184Hf | 206Pb, 205Tl, 208Pb, 180Hf | 7,600708 MeV | 0 |
| 235U | 0,72% | 235,043929918 | 7,04 × 108 år | 143 | α, SF | 231Th | 207Pb | 7,590907 MeV | 7/2 |
| 236U | 0% | 236,045568006 | 2,3437 × 107 år | 144 | α, SF | 232Th | 208Pb | 7,586477 MeV | 0 |
| 237U | 0% | 237,048730184 | 6,748 døgn | 145 | β– | 237Np | 205Tl | 7,576094 MeV | 1/2 |
| 238U | 99,2745% | 238,050788247 | 4,471 × 109 år | 146 | α, 2β– | 234Th, 238Pu | 206Pb | 7,57012 MeV | 0 |
| 239U | 0% | 239,054293299 | 23,45 minutt | 147 | β– | 239Np | 207Pb | 7,558557 MeV | 5/2 |
| 240U | 0% | 240,056591988 | 14,11 timer | 148 | β–, α | 240Np, 236Th | 208Pb | 7,551771 MeV | 0 |
| 241U | 0% | 241,06033 | 5 minutt | 149 | β– | 241Np | 205Tl, 207Pb | 7,539 MeV | 7/2 |
| 242U | 0% | 242,062931 | 16,833 minutt | 150 | β– | 242Np | 206Pb | 7,532 MeV | 0 |
Kilder
[rediger | rediger kilde]- Periodictable.com Besøkt 17. mars 2015
- Lawrence Berkeley National Laboratory Besøkt 17. mars 2015
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Credit:
(see original file).
