Vibrational branching ratios and photoelectron angular distributions in 5σ photoionisation of CO

Journal Article · Tue Oct 27 23:00:00 EST 1981 · Journal of Physics. B, Atomic and Molecular Physics

DOI:https://doi.org/10.1088/0022-3700/14/20/015· OSTI ID:1169920

Stephens, J. A. ^[1]; Dill, Dan ^[2]; Dehmer, Joseph L. ^[3]

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1. Boston Univ., MA (United States), Dept. of Chemistry
2. Boston Univ., MA (United States), Dept. of Chemistry
3. Argonne National Laboratory (ANL), Argonne, IL (United States)

Vibrationally resolved photoelectron angular distributions have been calculated for the 5σ photoionisation channel of CO using the multiple-scattering method. Vibrational branching ratios and vibrationally unresolved integrated cross sections and photoelectron angular distributions are also reported and compared with available measurements. Both angular distributions and branching ratios exhibit striking non-Franck-Condon behaviour caused primarily by the f-wave shape resonance in the sigma photoionisation continuum. Significant discrepancies between theory and experiment exist for the weaker v_f=2,3 vibrational levels and interaction with nearby two-electron excitation is proposed as a likely cause.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 1169920
• Journal Information: Journal of Physics. B, Atomic and Molecular Physics, Journal Name: Journal of Physics. B, Atomic and Molecular Physics Journal Issue: 20 Vol. 14; ISSN 0022-3700
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS