Fig. 5: Eigenphase sum and Wigner time delay for scattering from NO⁺.

Eigenphase sum for e-NO⁺ scattering from a one-channel calculation including only the c ³Π state of NO⁺, with the electron-kinetic energies given relative to the threshold for that state (a). One channel (1/2)\({\tau }_{{{{{{\rm{Wigner}}}}}}}\) time delay for the short-range part of the scattering phase shift compared to the photoionization time delays extracted from the resonant part of the multichannel Fano fit for theory and experiment as presented in Fig. 4e, and to the computed emission angle averaged ionization delay for the parallel orientation (see text) (b).