[en] The photoionization mass spectrum of ²³⁸UF₆ was obtained. At 600 A = 20.66 eV, the relative ionic abundances were as follows: UF₆⁺, 1.4; UF₅⁺, 100; UF⁺, 17; UF₃⁺, approx. 0.7; UF₂⁺, very weak; UF⁺, very weak; U⁺, essentially zero. The adiabatic ionization potential for UF₆ was 13.897 +- 0.005 eV. The production of UF₅⁺ begins at approx. 887 A = 13.98 eV, at which energy the UF₆⁺ partial cross section abruptly declines and then levels off. This behavior suggests the vague possibility of an isotope effect. The UF₄⁺ signal begins at approx. 725 A = 17.10 eV, at which energy the UF₅⁺ signal reaches a plateau value. The UF₅⁺ photoionization yield curve displays some autoionization structure from its threshold to approx. 750 A