[en] The codeposition of C₆₀ vapor with excess argon and concurrent argon resonance radiation has produced strong new absorptions at 973 and 1068 nm in solid argon at 11 ± 1 K. A similar experiment with CCl₄, added to serve as an electron trap, reduced the yield of the 1068 nm band with little effect on the 973 nm absorption. The 973 nm band is assigned to C₆₀⁺ produced by photoionization and the 1068 nm band to C₆₀^- formed by electron capture. These identifications are in excellent agreement with glassy matrix, solution and photoelectron spectra. Preliminary magnetic circular dichroism (MCD) spectra of the 973 nm C₆₀⁺ band have also been measured. Both the 1068 and 973 nm bands show a characteristic triplet structure which is tentatively attributed to the combined effects of spin-orbit and Jahn-Teller coupling