The rotationally resolved PFI-ZEKE (pulsed-field ionization zero-kinetic energy) photoelectron spectrum of ND 3 has been recorded at the v 2 + = 0, 1 and 2 thresholds, by single-photon VUV excitation from the ground-state. An assignment of the 2 2 A X 1 1 A X spectrum is presented, allowing a determination of the adiabatic ionization potential of ND 3 (82261.7(15) cm-1) and of the rotational constants and positions of the v 2 + = 0, 1 and 2 vibrational levels of the ND 3 + ion. These parameters are used in a multichannel quantum defect theory (MQDT) simulation of the highresolution photoionization spectrum in the range 82100-83300 cm-1 [(R. Seiler et al., J. Chem. Phys. 118 10024 (2003)]. A good simulation and an assignment of around 80% of the lines of the ND 3 photoionization spectrum are achieved, verifying the validity of the molecular constants derived from the PFI-ZEKE photoelectron spectrum and also the quantum defect parameters derived from ab initio calculations.
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