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Curium is a hard, dense, silvery metal with a high melting and boiling point for an actinide. ... 243 Cm with a ~30-year half-life and good energy yield of ~1.6 W/g ...
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.
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
Curium metal is a radionuclide and emits alpha particles upon radioactive decay. [12] Although it has a half life of 34 ms, many curium oxides, including curium sesquioxide, have half lives nearing thousands of years. [7] Curium, in the form of curium sesquioxide, can be inhaled into the body, causing many biological defects.
As the longest-lived radioactive isotope ruthenium-106 has a half-life of only 373.59 days, it has been suggested that the ruthenium and palladium in PUREX raffinate should be used as a source of the metals after allowing the radioactive isotopes to decay. [4] [5] After ten half life cycles have passed over 99.96% of any radioisotope is stable ...
Global shortages of nuclear chemical needed for cancer scans will see patients’ appointments cancelled, minister warns
While the areas outside the Interstate 90 corridor also recorded overdoses, more than half of 2024’s deaths occurred in five ZIP codes. The fatalities stretch from 99201, which saw 64 and ...
Half-life range Fission products of 235 U by yield [2] 4n 4n + 1 4n + 2 4n + 3 4.5–7% 0.04–1.25% <0.001% 228 Ra № 4–6 a: 155 Eu þ: 248 Bk [3] > 9 a: 244 Cm ƒ: 241 Pu ƒ: 250 Cf 227 Ac № 10–29 a: 90 Sr 85 Kr 113m Cd þ: 232 U ƒ: 238 Pu ƒ: 243 Cm ƒ: 29–97 a: 137 Cs 151 Sm þ: 121m Sn 249 Cf ƒ: 242m Am ƒ: 141–351 a No ...