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Joined 2026-09-21 Message
Incoming links: Neptunium-239
Neptunium 2026-10-18
Neptunium is the chemical element with atomic number 93. Its isotope neptunium-239 occurs between uranium-239 and plutonium-239 in a neutron-capture and beta decay production chain.
Uranium-239 2026-10-18
An unstable uranium isotope produced by neutron capture on uranium-238. Two successive beta-minus decays, through neptunium-239, lead to plutonium-239.