Neptunium, element 93 on the periodic table of elements, was the first transuranium element to be produced synthetically and the first actinide series transuranium element to be discovered. Its ...

Now, however, it looks as though the exotic elements plutonium and neptunium might provide a key to understanding this special property of metals.

Now chemists have expanded the library of such molecules, creating a trio of transuranium complexes that contain double bonds between neptunium and carbon (J. Am. Chem. Soc. 2022, DOI: 10.1021 ...

The principal funding sources for the neptunium sphere project were DOE Defense Programs,Office of Emergency Response and DOE Nuclear Nonproliferation, Nonproliferation Research and Engineering.

Neptunium and plutonium are harder to oxidize than uranium, making them more difficult to study. To address this challenge, scientists have designed donor ligands—molecules that contribute ...

Science News sponsorship position. To measure neptunium-237’s critical mass, the Los Alamos team cast a softball-size, 6-kg sphere of the metal that could nestle within two hemispheres of uranium.

This was just after Edwin M. McMillian and Philip H. Abelson succeeded in synthesizing neptunium-239. This isotope has a half-life of two and a half days, making it totally impractical as a weapon.

Although neptunium is barely talked about, uranium and plutonium are famous — some would say infamous — because in the early 1940s isotopes of uranium and plutonium were found to be fissile ...

"Enriched Uranium and Neptunium are currently identified as contaminants of concern by the U.S. Department of Energy on the Portsmouth Gaseous Diffusion Plant property," the board wrote.