Do rainbows observed in light ion scattering really pin down the optical potential?

Evolving model-free scattering matrix via evolutionary algorithm:O16-O16Korda1, Molev2, Korda3 2005Phys. Rev. C13010View full textAdd to dashboardCite

“…Note also the S-matrix model with the additional derivative-like interior term in the absorption phase δ a (l) [9]. The nonmonotonic behavior of the described type is also inherent in the scattering matrices found with help of the optical potentials which have both the standard SaxonWoods forms and the ones with the additional surface terms (see, e.g., [6], [10], [11]). In spite of the nonmonotonicity of S (l) in these approaches, the mentioned above "rainbow" interpretation of the data is, nevertheless, preserved.…”