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The biological half-life of curium is about 20 years in the liver and 50 years in the bones. [52] [54] Curium is absorbed in the body much more strongly via inhalation, and the allowed total dose of 244 Cm in soluble form is 0.3 μCi. [13]
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. [2] [3] The longest-lived known isomer is 246m Cm with a half-life of 1.12 seconds.
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 of californium's twenty known isotopes is californium-251, with a half-life of 898 years. This short half-life means the element is not found in significant quantities in the Earth's crust. [a] 252 Cf, with a half-life of about 2.645 years, is the most common isotope used and is produced at Oak Ridge National Laboratory (ORNL ...
The metaphorical clock measures how close humanity is to self-destruction, because of nuclear disaster, climate change, AI and misinformation.
Global shortages of nuclear chemical needed for cancer scans will see patients’ appointments cancelled, minister warns
Jeff Daniels and Sarah Jones in A Man in Full, streaming now on Netflix. Mark Hill/Netflix Here, Daniels talks to T&C about the series and why playing a bad guy is always a little bit more fun.
Plutonium-239 (239 Pu or Pu-239) is an isotope of plutonium.Plutonium-239 is the primary fissile isotope used for the production of nuclear weapons, although uranium-235 is also used for that purpose.