Journal of Physical Chemistry A, Vol.107, No.40, 8086-8091, 2003
Vacuum ultraviolet pulsed field ionization-photoelectron study for (NO+)-O-2 in the energy range of 16.3-21.0 eV
The vacuum ultraviolet pulsed field ionization-photoelectron (PFI-PE) spectra for N2O have been measured in the energy range of 16.3-21.0 eV, covering the vibronic bands of N2O+(A(2)Sigma(+), B(2)Pi, and C(2)Sigma(+)). Many vibronic bands, which were not resolved in previous photoelectron studies, are identified in the present measurement. As observed in the HeI photoelectron spectra of N2O, the PFI-PE spectra for N2O+(A(2)Sigma(+) and C(2)Sigma(+)) are dominated by excitation of the nu(1)(+) (symmetric stretching) and nu(3)(+) (antisymmetric stretching) modes, along with weak bands due to excitation of both even and odd quanta of the nu(2)(+) (bending) mode. The simulation of the rotational contours resolved in the PFI-PE bands associated with excitation to N2O+(A(2)Sigma(+), nu(1)(+) = 0-1, nu(2)(+) = 0, and nu(3)(+) = 0-1) has revealed the orbital angular momentum of the outgoing photoelectrons and yielded accurate ionization energies for the formation of these states from N2O(X(1)Sigma(+)).