Phys. Rev. Lett. 101, 023001 (2008) [4 pages]Internal Inelastic Scattering Satellite Probed by Molecular-Frame Photoelectron Angular Distributions from CO2Received 20 February 2008; published 10 July 2008 The molecular-frame photoelectron angular distribution (MFPAD) of the satellite accompanying the C 1s photoline of the CO2 molecule has been measured at the C 1s(2σg)→4σu* shape resonance, using electron-ion multicoincidence momentum spectroscopy. The observed MFPAD indicates that the conjugate satellite is excited by internal inelastic scattering. In this scenario, a photoelectron is ejected from the C 1s(2σg) orbital along the molecular axis and collides with an O lone-pair electron in the highest occupied molecular orbital 1πg. Then one of the colliding electrons is trapped to the lowest unoccupied molecular orbital 2πu*, while the other is emitted as a satellite photoelectron of σg symmetry, losing the information of the original photoelectron emission direction and parity. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.023001
DOI:
10.1103/PhysRevLett.101.023001
PACS:
33.60.+q, 33.80.−b, 34.80.−i
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