The benchmark system of molecular photoionization dynamics, the ($1+1^{\prime }$) two-photon ionization of NO via the $A$ state, is investigated using the time-energy mapping of the photoelectron angular distribution in a laboratory frame. The molecular frame photoelectron angular distribution and partial wave composition are determined from time-energy maps and compared with those obtained by Schwinger variational calculation (SVC) and state-to-state photoelectron spectroscopy. Good agreement is found with SVC. By comparison of the phase shifts of the scattering waves and the quantum defects of the Rydberg states, the $l$ hybridization of $p$ waves is identified.

• Received 30 October 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.073002