The formation of a neptunium(V) peroxo complex upon γ-radiolysis of aqueous alkaline solutions of neptunium ions

A neptunium(v) peroxo complex is formed upon γ-radiolysis of aerated aqueous alkaline solutions of Np(vi) or Np(v) ions containing nitrate; however, a Pu(v) peroxo complex is not formed under the same conditions.