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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.
Curium hydroxide is an anhydrous colorless [2] or light-yellow [5] amorphous gelatinous solid that is insoluble in water. [ 1 ] Due to self-irradiation, the crystal structure of 244 Cm(OH) 3 decomposes [ clarification needed ] within one day ( 244 Cm has a half-life of 18.11 years); for 241 Am(OH) 3 the same process takes 4 to 6 months ( 241 Am ...
The high short-term radioactivity of spent nuclear fuel is primarily from fission products with short half-life.The radioactivity in the fission product mixture is mostly due to short-lived isotopes such as 131 I and 140 Ba, after about four months 141 Ce, 95 Zr/ 95 Nb and 89 Sr constitute the largest contributors, while after about two or three years the largest share is taken by 144 Ce/ 144 ...
Global shortages of nuclear chemical needed for cancer scans will see patients’ appointments cancelled, minister warns
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 ...
Psychologists Arthur and Elaine Aron are known for research behind the “36 Questions That Lead to Love.” They share how their relationship has lasted over 50 years.