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Recently proposed extension of the empirical model (BELL) of Bell et al. (J Phys Chem Ref Data 1983, 12, 891) with incorporation of the quantum mechanical form of orbital radius from the DM model and a nonlinear feature in addition to the ionic and relativistic corrections is examined for electron‐impact single ionization in the K‐, L‐, and M‐shells of ionic and neutral atoms. This leads to the generalization...