Whereas the partial-wave expansion per eqn (4) provides a useful tool to analyze the wave function of the ejected photoelectron for contributions of different angular momentum quantum numbers, in practice it must be truncated at some finite value of ℓ. Such a truncation may be justified for molecular orbitals that resemble atomic orbitals, especially at low eKE. Nonetheless, we test the consequences of truncating the partial wave expansion at ℓ = 5 in two ways. First, we increased the upper limit of ℓ to 10. As shown in Fig. (b), this had a negligible effect on the ()