Photoionization dynamics of excited molecular states: D2 C 1Πu

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Abstract
The three photon resonant, four photon ionization spectra of D2 via the C 1Πu, v′=0–4 levels are reported. The photoelectron spectra for all five bands and the photoelectron angular distribution via the C 1Πu, v′=0–3←X 1∑+g, v″=0, Q(3) transitions are also reported. The photoelectron spectra are compared with theoretical Franck–Condon factors determined using accurate potential curves for the D2 C 1πu and D+2 X 2∑+g states. As in the case of H2, the photoelectron spectra display non‐Franck–Condon behavior, and the photoelectron angular distributions exhibit strong v+ dependences. The relation of the present results to earlier results on H2 is discussed.