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Breakdown of the Two-Step Model in K-Shell Photoemission and Subsequent Decay Probed by the Molecular-Frame Photoelectron Angular Distributions of CO2

Abstract : We report results of measurements and of Hartree-Fock level calculations of molecular-frame photoelectron angular distributions (MFPADs) for C 1s photoemission from CO2. The agreement between the measured and calculated MFPADs is on average reasonable. The measured MFPADs display a weak but definite asymmetry with respect to the O+ and CO+ fragment ions at certain energies, providing evidence for an overlap of gerade and ungerade final ionic states giving rise to a partial breakdown of the two-step model of core-level photoionization and its subsequent Auger decay.
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https://hal-cea.archives-ouvertes.fr/cea-00358606
Contributor : Chantal Brassy <>
Submitted on : Tuesday, February 3, 2009 - 7:25:47 PM
Last modification on : Thursday, September 10, 2020 - 2:46:58 PM

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  • HAL Id : cea-00358606, version 1

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X.-J. Liu, H. Fukuzawa, T. Teranishi, A. de Fanis, M. Takahashi, et al.. Breakdown of the Two-Step Model in K-Shell Photoemission and Subsequent Decay Probed by the Molecular-Frame Photoelectron Angular Distributions of CO2. Physical Review Letters, American Physical Society, 2008, 101, pp.083001. ⟨cea-00358606⟩

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