Thorium: Properties
Isotopes
| Natural Abun. (%) |
Atomic Mass |
Half- life |
Decay Mode /Energy (/MeV) |
Part. En. /Intensity (MeV/%) |
Cross-sect. Ther. Neut. (b) |
Spin (h/2 pi) |
Magnetic Dipl.Mom. (nm) |
Electric Quad. Mom. (b) |
Gamma En. /Intensity (MeV/%) |
|
| 212Th | 212.01289 | 30ms | alpha | 7.8 | 0+ | |||||
| 213Th | 213.01294 | 0.14s | alpha/ 7.84 | 7.692 | ||||||
| 214Th | 214.01143 | 0.09s | alpha/ 7.825 | 7.677 | 0+ | |||||
| 215Th | 215.01169 | 1.2s | alpha/ 7.66 | 7.33/ 8 7.395/ 52 7.524/ 40 |
1/2- | |||||
| 216mTh | 0.18ms | alpha | ||||||||
| 216Th | 216.01103 | 28ms | alpha/ 8.071 | 7.921 | 0+ | |||||
| 217Th | 217.01305 | 0.25ms | alpha/ 9.424 | 9.25 | ||||||
| 218Th | 218.013252 | 0.11µs | alpha/ 9.847 | 9.665 | 0+ | |||||
| 219Th | 219.01551 | 1.05µs | alpha/ 9.51 | 9.34 | ||||||
| 220Th | 220.015724 | 10µs | alpha/ 8.953 | 8.79 | 0+ | |||||
| 221Th | 221.01816 | 1.7ms | alpha/ 8.628 | 7.743/ 6 8.146/ 56 8.4274/ 39 |
||||||
| 222Th | 222.018447 | 2.8ms | alpha/ 8.129 | 7.982 | 0+ | |||||
| 223Th | 223.020659 | 0.65s | alpha/ 7.454 | 7.287/ 60 7.317/ 40 |
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| 224Th | 224.021449 | 1.05s | alpha/ 7.305 | 6.768/ 1.2 6.997/ 19 7.17/ 79 |
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| 225Th | 225.023922 | 8.72m | E.C./ 0.668 alpha/ 6.92 |
6.441/ 15 6.479/ 43 6.501/ 14 6.796/ 9 |
3/2+ | |||||
| 226Th | 226.024885 | 30.6m | alpha/ 6.454 | 6.026/ 0.2 6.041/ 0.19 6.098/ 1.3 6.2283/ 23 6.3375/ 75 |
0+ | Ra k x rays 0.1111 0.131 0.19028 0.20621 0.2421 0.1 - 0.8 | ||||
| 227Th | 227.027703 | 28.72d | alpha/ 6.146 | 3/2+ | Ra k x rays 0.05014 0.23597 0.25624 0.02 - 1 | |||||
| 228Th | 228.028715 | 1.913y | alpha/ 5.52 | 5.177/ 0.18 5.2114/ 0.4 5.3405/ 26.7 5.4233/ 73 |
120 b | 0+ | ||||
| 229Th | 229.031755 | 7900y | alpha/ 5.168 | 4.814/ 9.3 4.845/ 56 4.9008/ 10.2 4.689 - 5.077 |
60 b | 5/2+ | 0.46 nm | 4 b | ||
| 230Th | 230.033127 | 7.54x104y | alpha/ 4.771 | 4.4383/ 0.03 4.4798/ 0.12 4.6211/ 23.4 4.6876/ 76.3 |
23.4 b | 0+ | ||||
| 231Th | 231.036298 | 1.063d | ß-/ 0.39 | 0.138/ 22 0.218/ 20 0.305/ 52 |
5/2+ | Pa k x rays 0.02564 0.0842 0.02 - 0.3 | ||||
| 232Th | 100 % | 232.038054 | 1.4x1010y | alpha/ 4.081 | 3.83/ 0.2 3.952/ 23 4.01/ 77 |
7.37 b | 0+ | 0.059 0.124 | ||
| 233Th | 233.041577 | 22.3m | ß-/ 1.244 | 1.245 | 1500 b | 1/2+ | Pa k x rays 0.02938 0.08653 0.4593 0.02 - 1.2 | |||
| 234Th | 234.043593 | 24.1d | ß-/ 0.273 | 0.102/ 20 0.198/ 72 |
1.8 b | 0+ | Pa k x rays 0.06329 0.09235 0.09278 | |||
| 235Th | 235.04751 | 7.2m | ß-/ 1.92 | 0.4162 0.6594 0.7272 0.747 0.9318 | ||||||
| 236Th | 37.5m | ß-/ 1 | Pa k x rays 0.1107 |