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Isotopen van francium
Es Chemisches Elementfrancium (Fr), mit a Atommasse ab ca. 223 Sie, besitzt keine stabile Isotope und wird somit klassifiziert als radioaktivElement. Ab dem 34 Radioisotope nur Spuren von 223Fr, das zur Uran-235-Zerfallsreihe gehört und eine Halbwertszeit von 22 Minuten hat, ist damit das langlebigste Isotop von Francium.
Überblick
| Nuklid | Z (p) | N (nein) | Isotope Masse (u) | halbes Leben | Radioaktiver Zerfall | VP | Kernspin | Isotopenverhältnis (Molenbruch) | Natürliches Vorkommen (Molbruch) |
|---|---|---|---|---|---|---|---|---|---|
| Anregungsenergie | |||||||||
| 199fr | 87 | 112 | 199,00726(4) | 16(7) Millisekunden | 1/2 | ||||
| 200fr | 87 | 113 | 200,00657(8) | 24(10) ms | α | 196beim | 3 | ||
| 200mfr | 60(110) keV | 650(210) ms | α | 196beim | 10− | ||||
| ES (selten) | 200fr | ||||||||
| 201fr | 87 | 114 | 201,00386(8) | 67(3) ms | (99%) | 197beim | (9/2−) | ||
| β (1%) | 201rn | ||||||||
| 202fr | 87 | 115 | 202,00337(5) | 290 (30) ms | (97%) | 198beim | (3) | ||
| β (3%) | 202rn | ||||||||
| 202mfr | 330(90) keV | 340(40) ms | (97%) | 198beim | (10−) | ||||
| β (3%) | 202rn | ||||||||
| 203fr | 87 | 116 | 203,000925(17) | 0,55(2) s | (95%) | 199beim | (9/2−) | ||
| β (5%) | 203rn | ||||||||
| 204fr | 87 | 117 | 204,000653(26) | 1,7(3) Sek. | (96%) | 200beim | (3) | ||
| β (4%) | 204rn | ||||||||
| 204m1fr | 50(4) keV | 2,6(3) s | (90%) | 200beim | (7) | ||||
| β (10%) | 204rn | ||||||||
| 204m2fr | 326(4) keV | 1.7(6) s | (10−) | ||||||
| 205fr | 87 | 118 | 204,998594(8) | 3,80(3) Sek. | (99%) | 201beim | (9/2−) | ||
| β (1%) | 205rn | ||||||||
| 206fr | 87 | 119 | 205,99867(3) | ± 16 s | β (58%) | 206rn | (2, 3) | ||
| (42%) | 202beim | ||||||||
| 206m1fr | 190(40) keV | 15.9(1) s | (7) | ||||||
| 206m2fr | 730(40) keV | 700(100) ms | (10−) | ||||||
| 207fr | 87 | 120 | 206,99695(5) | 14,8(1) s | (95%) | 203beim | 9/2− | ||
| β (5%) | 207rn | ||||||||
| 208fr | 87 | 121 | 207,99714(5) | 59,1(3) Sek. | (90%) | 204beim | 7 | ||
| β (10%) | 208rn | ||||||||
| 209fr | 87 | 122 | 208,995954(16) | 50,0(3) Sek. | (89%) | 205beim | 9/2− | ||
| β (11%) | 209rn | ||||||||
| 210fr | 87 | 123 | 209,996408(24) | 3,18(6) min | (60%) | 206beim | 6 | ||
| β (40%) | 210rn | ||||||||
| 211fr | 87 | 124 | 210,995537(23) | 3,10 (2) Minuten | (80%) | 207beim | 9/2− | ||
| β (20%) | 211rn | ||||||||
| 212fr | 87 | 125 | 211,996202(28) | 20,0(6) min | β (57%) | 212rn | 5 | ||
| (43%) | 208beim | ||||||||
| 213fr | 87 | 126 | 212,996189(8) | 34,6(3) Sek. | (99,45%) | 209beim | 9/2− | ||
| β (0,55%) | 213rn | ||||||||
| 214fr | 87 | 127 | 213,998971(9) | 5,0(2) ms | α | 210beim | (1−) | ||
| 214m1fr | 123(6) keV | 3,35(5) ms | α | 210beim | (8−) | ||||
| 214m2fr | 638(6) keV | 103(4) ns | (11) | ||||||
| 214m3fr | 6477 keV | 108(7) ns | (33) | ||||||
| 215fr | 87 | 128 | 215,000341(8) | 86(5) ns | α | 211beim | 9/2− | ||
| 216fr | 87 | 129 | 216,003198(15) | 0,70(2) µs | α | 212beim | (1−) | ||
| β (2 × 10−7%) | 216rn | ||||||||
| 217fr | 87 | 130 | 217,004632(7) | 16,8 (19) µs | α | 213beim | 9/2− | ||
| 218fr | 87 | 131 | 218,007578(5) | 1,0(6)ms | α | 214beim | 1− | ||
| 218m1fr | 86(4) keV | 22,0(5) ms | α | 214beim | |||||
| IT (selten) | 218fr | ||||||||
| 218m2fr | 200(150) keV | ||||||||
| 219fr | 87 | 132 | 219,009252(8) | 20(2) ms | α | 215beim | 9/2− | ||
| 220fr | 87 | 133 | 220,012327(4) | 27,4(3) Sek. | (99,65 %) | 216beim | 1 | ||
| β− (0,35%) | 220ra | ||||||||
| 221fr | 87 | 134 | 221,014255(5) | 4,9 (2) Minuten | (99,9 %) | 217beim | 5/2− | ||
| β− (0,1%) | 221ra | ||||||||
| fortsetzen (8,79 × −11%) | 207tl, 14C | ||||||||
| 222fr | 87 | 135 | 222,017552(23) | 14,2(3) min | β− | 222ra | 2− | ||
| 223fr | 87 | 136 | 223,0197359(26) | 22.00(7) Minuten | β− (99,99%) | 223ra | 3/2− | Spuren | |
| (0,006%) | 219beim | ||||||||
| 224fr | 87 | 137 | 224,02325(5) | 3,33(10) Minuten | β− | 224ra | 1− | ||
| 225fr | 87 | 138 | 225,02557(3) | 4,0(2) Minuten | β− | 225ra | 3/2− | ||
| 226fr | 87 | 139 | 226,02939(11) | 49(1) s | β− | 226ra | 1− | ||
| 227fr | 87 | 140 | 227,03184(11) | 2,47(3) min | β− | 227ra | 1/2 | ||
| 228fr | 87 | 141 | 228,03573(22) | 38(1) s | β− | 228ra | 2− | ||
| 229fr | 87 | 142 | 229,03845(4) | 50,2(4) Sek. | β− | 229ra | (1/2) | ||
| 230fr | 87 | 143 | 230,04251(48) | 19.1(5) s | β− | 230ra | |||
| 231fr | 87 | 144 | 231,04544(50) | 17,6(6) s | β− | 231ra | (1/2) | ||
| 232fr | 87 | 145 | 232,04977(69) | 5(1) s | β− | 232ra | |||
Übersicht der Isotope pro Element
Siehe auch
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