title: Internal inelastic scattering satellite probed by molecular-frame photoelectron angular distributions from CO2.
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.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors.forename: X-J
authors.initials: XJ
authors.lastname: Liu
authors.forename: H
authors.initials: H
authors.lastname: Fukuzawa
authors.forename: T
authors.initials: T
authors.lastname: Teranishi
authors.forename: A
authors.initials: A
authors.lastname: De Fanis
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: H
authors.initials: H
authors.lastname: Yoshida
authors.forename: A
authors.initials: A
authors.lastname: Cassimi
authors.forename: A
authors.initials: A
authors.lastname: Czasch
authors.forename: L
authors.initials: L
authors.lastname: Schmidt
authors.forename: R
authors.initials: R
authors.lastname: Dörner
authors.forename: I
authors.initials: I
authors.lastname: Koyano
authors.forename: N
authors.initials: N
authors.lastname: Saito
authors.forename: K
authors.initials: K
authors.lastname: Ueda