(a) Absorption spectrum of C₆₀ isolated in a Ne matrix, not corrected for scattering. Band labels according to Leach et al. (1992). (b) Gaussian profiles (thick gray solid curve) fitted to bands of the 1¹ T_1u ←¹A_g transition, including A₀ and A₁, and to the baseline. (c) Gaussian profiles (thick gray solid curve) fitted, with a common FWHM, to absorptions near the γ₀ band. Fittedband positions are 16 431.1 ± 1.2 cm⁻¹, 24 829.04 ± 0.98 cm⁻¹, and 25 087.73 ± 0.65 cm⁻¹ for γ₀, A₀, and A₁, respectively.The wavelength scale of the spectrometer was calibrated with an accuracy of 0.3 nm.