WikiDer > Isotope von Actinium
Isotopen van actinium
Es Chemisches ElementAktinium (Ac), mit a Atommasse ab ca. 227 Sie, besitzt keine stabile Isotope und wird somit klassifiziert als radioaktivElement. Die 31 Radioisotope sind instabil und haben eine relativ kurze Halbwertszeit (meistens weniger als eins). zweite). Spuren der Radioisotope finden sich in der Natur 227ac und das viel seltenere 228Ak für.
Das kurzlebige Isotop von Actinium ist 206Ac, mit einer Halbwertszeit von etwa 25 Millisekunden. Die langlebigste ist 227Ac, mit einer Halbwertszeit von 21.772 Jahr.
Überblick
| Nuklid | Z (p) | N (nein) | Isotope Masse (u) | halbes Leben | Radioaktiver Zerfall | VP | Kernspin | Isotopenverhältnis (Molenbruch) | Natürliches Vorkommen (Molbruch) |
|---|---|---|---|---|---|---|---|---|---|
| Anregungsenergie | |||||||||
| 206ac | 89 | 117 | 206,01450(8) | 25(7) ms | (3) | ||||
| 206m1ac | 80(50) keV | 15(6) ms | |||||||
| 206m2ac | 290(110) keV | 41(16) ms | (10−) | ||||||
| 207ac | 89 | 118 | 207,01195(6) | 31(8) ms | α | 203fr | 9/2− | ||
| 208ac | 89 | 119 | 208,01155(6) | 97(16) ms | (99%) | 204fr | (3) | ||
| β (1%) | 208ra | ||||||||
| 208mac | 506(26) keV | 28(7) Millisekunden | (89%) | 204fr | (10−) | ||||
| ES (10%) | 208ac | ||||||||
| β (1%) | 208ra | ||||||||
| 209ac | 89 | 120 | 209,00949(5) | 92(11) ms | (99%) | 205fr | (9/2−) | ||
| β (1%) | 209ra | ||||||||
| 210ac | 89 | 121 | 210,00944(6) | 350(40) ms | (96%) | 206fr | 7 | ||
| β (4%) | 210ra | ||||||||
| 211ac | 89 | 122 | 211,00773(8) | 213 (25) ms | (99,8%) | 207fr | 9/2− | ||
| β (0,2%) | 211ra | ||||||||
| 212ac | 89 | 123 | 212,00781(7) | 920(50) ms | (97%) | 208fr | 6 | ||
| β (3%) | 212ra | ||||||||
| 213ac | 89 | 124 | 213,00661(6) | 731(17) ms | α | 209fr | (9/2−) | ||
| β (selten) | 213ra | ||||||||
| 214ac | 89 | 125 | 214,006902(24) | 8,2(2) Sek. | (89%) | 210fr | (5) | ||
| β (11%) | 214ra | ||||||||
| 215ac | 89 | 126 | 215,006454(23) | 0,17(1) s | (99,91%) | 211fr | 9/2− | ||
| β (0,09%) | 215ra | ||||||||
| 216ac | 89 | 127 | 216,008720(29) | 0,440(16) ms | α | 212fr | (1−) | ||
| β (7 × 10−5%) | 216ra | ||||||||
| 216mac | 44(7) keV | 443(7) µs | (9−) | ||||||
| 217ac | 89 | 128 | 217,009347(14) | 69(4) ns | (98%) | 213fr | 9/2− | ||
| β (2%) | 217ra | ||||||||
| 217mac | 2012(20) keV | 740(40) ns | 29/2 | ||||||
| 218ac | 89 | 129 | 218,01164(5) | 1,08(9) µs | α | 214fr | (1−) | ||
| 218mac | 584(50) keV | 103(11) ns | (11) | ||||||
| 219ac | 89 | 130 | 219,01242(5) | 11,8(15) µs | α | 215fr | 9/2− | ||
| β (10−6%) | 219ra | ||||||||
| 220ac | 89 | 131 | 220,014763(16) | 26,36(19) ms | α | 216fr | (3−) | ||
| β (5 × 10−4%) | 220ra | ||||||||
| 221ac | 89 | 132 | 221,01559(5) | 52(2) ms | α | 217fr | 9/2− | ||
| 222ac | 89 | 133 | 222,017844(6) | 5,0(5) Sek. | (99%) | 218fr | 1− | ||
| β (1%) | 222ra | ||||||||
| 222 mac | 200(150) keV | 1,05(7) min | (88,6%) | 218fr | |||||
| IT (10%) | 222ac | ||||||||
| β (1,4%) | 222ra | ||||||||
| 223ac | 89 | 134 | 223,019137(8) | 2,10(5) min | (99%) | 219fr | (5/2−) | ||
| EV (1%) | 223ra | ||||||||
| fortsetzen (3,2 × 10−9%) | 209Bi, 14C | ||||||||
| 224ac | 89 | 135 | 224,021723(4) | 2,78(17) Stunden | β (90,9%) | 224ra | 0− | ||
| (9,1%) | 220fr | ||||||||
| β− (1,6%) | 224aber | ||||||||
| 225ac | 89 | 136 | 225,023230(5) | 10,0(1) Tage | α | 221fr | (3/2−) | ||
| Lebenslauf (6×10−10%) | 211Bi, 14C | ||||||||
| 226ac | 89 | 137 | 226,026098(4) | 29.37(12) Stunden | β− (83%) | 226aber | (1−) | ||
| EV (17%) | 226ra | ||||||||
| (0,006%) | 222fr | ||||||||
| 227ac | 89 | 138 | 227,0277521(26) | 21.772(3) Jahre | β− (98,61%) | 227aber | 3/2− | Spuren | |
| (1,38 %) | 223fr | ||||||||
| 228ac | 89 | 139 | 228,0310211(27) | 6.15(2) Stunden | β− | 228aber | 3 | Spuren | |
| (5,5×10−6%) | 224fr | ||||||||
| 229ac | 89 | 140 | 229,03302(4) | 62,7(5) min | β− | 229aber | (3/2) | ||
| 230ac | 89 | 141 | 230,03629(32) | 122(3) s | β− | 230aber | (1) | ||
| 231ac | 89 | 142 | 231,03856(11) | 7,5 (1) Minuten | β− | 231aber | (1/2) | ||
| 232ac | 89 | 143 | 232,04203(11) | 119(5) s | β− | 232aber | (1) | ||
| 233ac | 89 | 144 | 233,04455(32) | 145(10) s | β− | 233aber | (1/2) | ||
| 234ac | 89 | 145 | 234,04842(43) | 44(7) s | β− | 234aber | |||
| 235ac | 89 | 146 | 235,05123(38) | 40 s | β− | 235aber | 1/2 | ||
| 236ac | 89 | 147 | 236,05530(54) | 2 Minuten | β− | 236aber | |||
Übersicht der Isotope pro Element
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