Superexcited states of NO studied by angle-resolved electron-energy-loss spectroscopy
- Hefei National Laboratory for Physical Sciences at Microscale, Laboratory of Bond-Selective Chemistry, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230027 (China)
- Department of Physics, Graduate School of the Chinese Academy of Sciences, P. O. Box 3908, Beijing 100039 (China)
Absolute double differential cross section spectra of NO below 135 eV have been determined by an angle-resolved electron-energy-loss spectrometer with an incident electron energy of 2500 eV and an energy resolution of 100 meV. Some features above the first ionization threshold, which are too weak to be observed in the photoabsorption spectrum, stand out at large scattering angles. The present measured features and those unassigned ones in the fluorescence spectra [Chem. Phys. 293, 65 (2003)] are assigned based on the present experimental work and theoretical analysis. The energy levels of 4{sigma}{sup -1}(c{sup 3}{pi})ns{sigma}(n=3-5), 4{sigma}{sup -1}(B {sup 1}{pi})ns{sigma}(n=3-5), a vibrational resolved doubly excited state, and the inner-valence transition 2{pi} <- 3{sigma} are determined. Meanwhile, the ionization threshold (22.1 eV) of (4{sigma}){sup -1} B {sup 1}{pi} is estimated.
- OSTI ID:
- 20643908
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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