C.M. Roehl, D. Bauer, and G.K. Moortgat, "Absorption spectrum and kinetics of the acetylperoxy radical," J. Phys. Chem. 100, 4038-4047 (1996) and

M.M. Maricq and J.J. Szente, "The CH₃C(O)O₂ radical. Its UV spectrum, self-reaction kinetics, and reaction with CH₃O₂," J. Phys. Chem. 100, 4507-4513 (1996).

The data were fitted to the sum of two Gaussian functions:

σ = σ_max1 × exp{-a₁ [ln (ν - ν_max1)]²} + σ_max2 × exp{-a₂ [ln (ν - ν_max2)]²}

which yielded

σ_max1 = 6.29×10^-18cm² molecule^-1, λ_max1 = 206.0 nm, and a₁ = 168,
σ_max2 = 3.26×10^-18cm² molecule^-1, λ_max2 = 246.1 nm, and a₂ = 64.2