Isotope von Radium
Für Radium sind hier 34 Isotope mit gemessener Halbwertszeit aufgeführt. Radium hat kein stabiles Isotop. Am langlebigsten ist Radium-226 mit einer Halbwertszeit von 1.600 Jahren.
Alle Isotope
| Isotop | Neutronen | Halbwertszeit | Hauptzerfallsart | Entdeckt |
|---|---|---|---|---|
| Radium-201 | 113 | 20 Millisekunden | Alpha-Zerfall | 2005 |
| Radium-202 | 114 | 4,1 Millisekunden | Alpha-Zerfall | 2005 |
| Radium-203 | 115 | 36 Millisekunden | Alpha-Zerfall | 1996 |
| Radium-204 | 116 | 60 Millisekunden | Alpha-Zerfall | 1995 |
| Radium-205 | 117 | 220 Millisekunden | Alpha-Zerfall | 1987 |
| Radium-206 | 118 | 240 Millisekunden | Alpha-Zerfall | 1967 |
| Radium-207 | 119 | 1,38 Sekunden | Alpha-Zerfall | 1967 |
| Radium-208 | 120 | 1,11 Sekunden | Alpha-Zerfall | 1967 |
| Radium-209 | 121 | 4,71 Sekunden | Alpha-Zerfall | 1967 |
| Radium-210 | 122 | 4 Sekunden | Alpha-Zerfall | 1967 |
| Radium-211 | 123 | 12,6 Sekunden | Alpha-Zerfall | 1967 |
| Radium-212 | 124 | 13 Sekunden | Alpha-Zerfall (vermutet) | 1967 |
| Radium-213 | 125 | 2,73 Minuten | Alpha-Zerfall | 1955 |
| Radium-214 | 126 | 2,437 Sekunden | Alpha-Zerfall | 1967 |
| Radium-215 | 127 | 1,669 Millisekunden | Alpha-Zerfall | 1967 |
| Radium-216 | 128 | 172 Nanosekunden | Alpha-Zerfall | 1972 |
| Radium-217 | 129 | 1,95 Mikrosekunden | Alpha-Zerfall | 1970 |
| Radium-218 | 130 | 25,91 Mikrosekunden | Alpha-Zerfall | 1970 |
| Radium-219 | 131 | 9 Millisekunden | Alpha-Zerfall | 1952 |
| Radium-220 | 132 | 18,1 Millisekunden | Alpha-Zerfall | 1949 |
| Radium-221 | 133 | 25 Sekunden | Alpha-Zerfall | 1949 |
| Radium-222 | 134 | 33,6 Sekunden | Alpha-Zerfall | 1948 |
| Radium-223 | 135 | 11,4352 Tage | Alpha-Zerfall | 1905 |
| Radium-224 | 136 | 3,6316 Tage | Alpha-Zerfall | 1902 |
| Radium-225 | 137 | 14,82 Tage | Beta-minus-Zerfall | 1947 |
| Radium-226 | 138 | 1.600 Jahre | Alpha-Zerfall | 1898 |
| Radium-227 | 139 | 42,2 Minuten | Beta-minus-Zerfall | 1953 |
| Radium-228 | 140 | 5,75 Jahre | Beta-minus-Zerfall | 1907 |
| Radium-229 | 141 | 4 Minuten | Beta-minus-Zerfall | 1975 |
| Radium-230 | 142 | 93 Minuten | Beta-minus-Zerfall | 1978 |
| Radium-231 | 143 | 104 Sekunden | Beta-minus-Zerfall | 1983 |
| Radium-232 | 144 | 4 Minuten | Beta-minus-Zerfall | 1983 |
| Radium-233 | 145 | 30 Sekunden | Beta-minus-Zerfall | 1990 |
| Radium-234 | 146 | 30 Sekunden | Beta-minus-Zerfall | 1990 |