Details

Autor(en) / Beteiligte

• Sun, Jian-Min
• Zhong, Zhi-Ping
• Zhu, Lin-Fan
• Li, Wen-Bin
• Liu, Xiao-Jing
• Yuan, Zhen-Sheng
• Xu, Ke-Zun

Titel

Superexcited states of NO studied by angle-resolved electron-energy-loss spectroscopy

Ist Teil von

• Physical review. A, Atomic, molecular, and optical physics, 2004-07, Vol.70 (1), Article 012708

Ort / Verlag

United States

Erscheinungsjahr

2004

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.