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Np with a half-life of 396.1 days. All of the remaining radioactive isotopes have half-lives that are less than 4.5 days, and the majority of these have half-lives that are less than 50 minutes. This element also has five meta states, with the most stable being 236m Np (t 1/2 22.5 hours). The isotopes of neptunium range from 219 Np to 244 Np
25.4 1.52 radon-221: 25.7 1.54 americium-244m: 26 1.6 uranium-235m: 26 1.6 astatine-205: 26.2 1.57 lead-214: 26.8 1.61 mendelevium-255: 27 1.6 bismuth-199: 27 1.6 einsteinium-248: 27 1.6 mendelevium-254m: 28 1.7 radon-209: 28.5 1.71 fermium-250: 30.4 1.82 thorium-226: 30.57 1.834 astatine-206: 30.6 1.84 bismuth-200m1: 31 1.9 plutonium-232: 33.7 ...
A chart or table of nuclides maps the nuclear, or radioactive, behavior of nuclides, as it distinguishes the isotopes of an element.It contrasts with a periodic table, which only maps their chemical behavior, since isotopes (nuclides that are variants of the same element) do not differ chemically to any significant degree, with the exception of hydrogen.
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 ...
English. Read; Edit; View history; Tools. ... Download as PDF; Printable version; In other projects Wikidata item; ... 236 Np synth 1.54 × 10 5 y:
Actinium-225 has a half-life of 10 days and decays by alpha emission. It is part of the neptunium series, for it arises as a decay product of neptunium-237 and its daughters such as uranium-233 and thorium-229. It is the last nuclide in the chain with a half-life over a day until the penultimate product, bismuth-209 (half-life 2.01 × 10 19 ...
Laetitia H. Delmau, recipient of the prestigious 2024 Glenn T. Seaborg Actinide Separations Award and a distinguished radiochemist in the Radioisotope Science and Technology Division at Oak Ridge ...
A further 10 nuclides, platinum-190, samarium-147, lanthanum-138, rubidium-87, rhenium-187, lutetium-176, thorium-232, uranium-238, potassium-40, and uranium-235 have half-lives between 7.0 × 10 8 and 4.83 × 10 11 years, which means they have experienced at least 0.5% depletion since the formation of the Solar System about 4.6 × 10 9 years ...