Back Плутоній-244 Byelorussian Плутоний-244 Bulgarian Plutonium-244 Czech Πλουτώνιο-244 Greek Plutonio 244 Spanish Plutonium 244 French प्लूटोनियम-२४४ Hindi Plutonium-244 Interlingua Plutonium-244 ID プルトニウム244 Japanese
 A concentrated solution of plutonium-244 | |
| General | |
|---|---|
| Symbol | 244Pu |
| Names | plutonium-244, 244Pu, Pu-244 |
| Protons (Z) | 94 |
| Neutrons (N) | 150 |
| Nuclide data | |
| Natural abundance | Trace |
| Half-life (t1/2) | 8×107 years[1] |
| Isotope mass | 244.0642044[2] Da |
| Spin | 0+ |
| Parent isotopes | 248Cm (α) 244Np (β−) |
| Decay products | 240U |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| α (99.879%) | |
| SF (0.121%) | |
| Isotopes of plutonium Complete table of nuclides | |
Plutonium-244 (244
Pu
) is an isotope of plutonium that has a half-life of 80 million years. This is longer than any of the other isotopes of plutonium and longer than any other actinide isotope except for the three naturally abundant ones: uranium-235 (704 million years), uranium-238 (4.468 billion years), and thorium-232 (14.05 billion years). Given the mathematics of the decay of plutonium-244, an exceedingly small amount should still be present in the Earth's composition, making plutonium a likely although unproven candidate as the shortest-lived primordial element.
- ^ Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001.
- ^ Wang, M.; Audi, G.; Kondev, F. G.; Huang, W. J.; Naimi, S.; Xu, X. (2017). "The AME2016 atomic mass evaluation (II). Tables, graphs, and references" (PDF). Chinese Physics C. 41 (3): 030003-1–030003-442. doi:10.1088/1674-1137/41/3/030003.