title: 1s2p resonant inelastic X-ray scattering combined dipole and quadrupole analysis method.
abstract: In this study an analysis strategy towards using the resonant inelastic X-ray scattering (RIXS) technique more effectively compared with X-ray absorption spectroscopy (XAS) is presented. In particular, the question of when RIXS brings extra information compared with XAS is addressed. To answer this question the RIXS plane is analysed using two models: (i) an exciton model and (ii) a continuum model. The continuum model describes the dipole pre-edge excitations while the exciton model describes the quadrupole excitations. Applying our approach to the experimental 1s2p RIXS planes of VO2and TiO2, it is shown that only in the case of quadrupole excitations being present is additional information gained by RIXS compared with XAS. Combining this knowledge with methods to calculate the dipole contribution in XAS measurements gives scientists the opportunity to plan more effective experiments.
authors.affiliation: Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark.
authors.forename: Alexander
authors.initials: A
authors.lastname: Bagger
authors.affiliation: Haldor Topsoe A/S, DK-2800 Lyngby, Denmark.
authors.forename: Ties
authors.initials: T
authors.lastname: Haarman
authors.affiliation: Haldor Topsoe A/S, DK-2800 Lyngby, Denmark.
authors.forename: Anna
authors.initials: A
authors.lastname: Puig Molina
authors.affiliation: Haldor Topsoe A/S, DK-2800 Lyngby, Denmark.
authors.forename: Poul George
authors.initials: PG
authors.lastname: Moses
authors.affiliation: National Synchrotron Radiation Research Center, SPring-8, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Ishii
authors.affiliation: National Synchrotron Radiation Research Center, SPring-8, Japan.
authors.forename: Nozomu
authors.initials: N
authors.lastname: Hiraoka
authors.affiliation: National Synchrotron Radiation Research Center, SPring-8, Japan.
authors.forename: Yu Han
authors.initials: YH
authors.lastname: Wu
authors.affiliation: National Synchrotron Radiation Research Center, SPring-8, Japan.
authors.forename: Ku Ding
authors.initials: KD
authors.lastname: Tsuei
authors.affiliation: Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark.
authors.forename: Ib
authors.initials: I
authors.lastname: Chorkendorff
authors.affiliation: Department of Inorganic Chemistry and Catalysis, Debye Institute, University of Utrecht, Sorbonnelaan 16, 3584 CA Utrecht, The Netherlands.
authors.forename: Frank
authors.initials: F
authors.lastname: De Groot
keywords: RIXS; X-ray absorption; X-ray emission; resonant inelestic X-ray scattering