Fig. 1: Resolving the complex-valued photoionization amplitudes in the molecular frame across a shape resonance.

Energy dependence of the complex-valued photoionization dipole amplitudes for the ionization of NO leading to the (4σ)⁻¹ c ³Π state of NO⁺ plotted as a function of the emission direction \(\hat{k}\) in the molecular frame for molecules oriented parallel to linearly polarized light in the region of the NO \(4\sigma \to k\sigma^*\) shape resonance. The computed magnitudes and phases are represented by the radius vector and the color of the line plots, respectively. The energy derivative of the PDA phases gives access to photoionization time delays. For photon energy of 31 eV at the peak of the resonance, the PDAs are dominated by the coherent superposition of partial waves up to l = 3 as shown.