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This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
The most stable isotope, 247 Cm, has a half-life of 15.6 million years; the longest-lived curium isotopes predominantly emit alpha particles. Radioisotope thermoelectric generators can use the heat from this process, but this is hindered by the rarity and high cost of curium.
14 Δεκ 2018 · The longest-lived curium isotope, 247 Cm, is also created during r-process nucleosynthesis in supernovae, as well as in smaller kilonovae involving neutron star mergers 29. With a half-life...
The longest-lived isotope is 247 Cm, with half-life 15.6 million years – orders of magnitude longer than that of any known isotope beyond curium, and long enough to study as a possible extinct radionuclide that would be produced by the r-process.
21 Σεπ 2024 · Curium-245: Half-life of ~8,500 years, mainly used in scientific studies. Curium-247: Longest half-life of 15.6 million years. Curium-248: Half-life of ~340,000 years, highly radioactive and used in long-term studies. Curium-250: Unusual in that it mainly decays via spontaneous fission.
24 Σεπ 2013 · It may, however, have existed long ago. The most stable isotope of curium, 247 Cm, has a half-life of 16 million years. Compared to the Earth’s age, this is relatively short.
Curium can build up in bones, where its radiation disrupts red-cell formation. Uses : Because of its long half-life, curium-242 can be safely used as energy for pacemakers, remote navigational buoys, and space missions.
