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Neptunium-239 has 146 neutrons and a half-life of 2.356 days. It is produced via β − decay of the short-lived uranium-239 , and undergoes another β − decay to plutonium-239 . This is the primary route for making plutonium, as 239 U can be made by neutron capture in uranium-238 .
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 2.02 lead-211: 36.1 2.17 neptunium-233: 36.2 2.17 bismuth-200: 36.4 2. ...
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.
Fission product yields by mass for thermal neutron fission of U-235 and Pu-239 (the two typical of current nuclear power reactors) and U-233 (used in the thorium cycle). This page discusses each of the main elements in the mixture of fission products produced by nuclear fission of the common nuclear fuels uranium and plutonium.
Periodic table for looking up element numbers (atomic number). The isotope tables given below show all of the known isotopes of the chemical elements, arranged with increasing atomic number from left to right and increasing neutron number from top to bottom.
The 4n + 1 decay chain of neptunium-237, commonly called the "neptunium series" Twenty-four neptunium radioisotopes have been characterized, with the most stable being 237 Np with a half-life of 2.14 million years, 236 Np with a half-life of 154,000 years, and 235 Np with a half-life of 396.1 days.
The radioisotopes were separated from neutron-irradiated target elements using remotely controlled robotic arms in heavily shielded hot cells in the nearby Radiochemical Engineering Development ...
The 4n + 1 chain of neptunium-237 is commonly called the "neptunium series" or "neptunium cascade". In this series, only two of the isotopes involved are found naturally in significant quantities, namely the final two: bismuth-209 and thallium-205.