Quantum defect theory of the molecular photoabsorption process: NO spectra in the energy region 9.3–22.0 eV

The vacuum ultraviolet photoabsorption spectra of NO are calculated by the multiscattering self-consistent-field method and all the excited states are treated in a unified manner in the framework of quantum defect theory. With the calculated results we provide clear assignments for the experimental spectra in the energy region of 9.3–22.0 eV, and then obtain corresponding excitation energies and optical oscillator strengths for electronic transitions. Our calculated values are in good agreement with the available experimental data. In addition, we have determined the photodissociation and photoionization oscillator strengths for B 2Π, L 2Π, and 4 2Π, respectively from the available experimental spectra.