Internal inelastic scattering satellite probed by molecular-frame photoelectron angular distributions from CO2 |
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Authors: | Liu X-J Fukuzawa H Teranishi T De Fanis A Takahashi M Yoshida H Cassimi A Czasch A Schmidt L Dörner R Koyano I Saito N Ueda K |
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Affiliation: | Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan. |
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Abstract: | 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(2sigmag)-->4sigmau* 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(2sigmag) orbital along the molecular axis and collides with an O lone-pair electron in the highest occupied molecular orbital 1pig. Then one of the colliding electrons is trapped to the lowest unoccupied molecular orbital 2piu*, while the other is emitted as a satellite photoelectron of sigmag symmetry, losing the information of the original photoelectron emission direction and parity. |
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