Datum
2024-06-26Autor
Rezvan, Dmitrii V.Pier, AndreasGrundmann, SvenNovikovskiy, Nikolay M.Anders, NilsKircher, MaxMelzer, NiklasTrinter, FlorianSchöffler, Markus S.Jahnke, TillDörner, ReinhardDemekhin, Philipp V.Metadata
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Nondipolar photoelectron angular distributions from fixed-in-space N₂ molecules
Zusammenfassung
We investigate experimentally and theoretically the N 1s photoionization of fixed-in-space N2 molecules at a photon energy of 880 eV. In our experiment, we employed circularly polarized synchrotron radiation for the photoionization and coincident electron and fragment-ion detection using cold target recoil ion momentum spectroscopy. The accompanying angle-resolved calculations were carried out by the multichannel single-center method and code within the frozen-core Hartree–Fock approximation. The computed emission distributions exhibit two distinct features along the molecular axis, which are the results of a superposition of the direct and nearest-neighbor scattering amplitudes for the photoemission from two nitrogen atoms. In the electric-dipole approximation, these peaks are symmetric with respect to both nitrogen atoms. Including nondipole (retardation) effects in the calculations results in a simultaneous increase and decrease of the scattering peaks towards the nitrogen atoms pointing in the forward and backward directions along the light propagation, respectively. These theoretical findings are in agreement with our experimental findings.
Zitierform
In: Journal of Physics B: Atomic, Molecular and Optical Physics Volume 57 / Number 14 (2024-06-26) eissn:1361-6455Förderhinweis
Gefördert im Rahmen eines Open-Access-Transformationsvertrags mit dem VerlagZitieren
@article{doi:10.17170/kobra-2024080210634,
author={Rezvan, Dmitrii V. and Pier, Andreas and Grundmann, Sven and Novikovskiy, Nikolay M. and Anders, Nils and Kircher, Max and Melzer, Niklas and Trinter, Florian and Schöffler, Markus S. and Jahnke, Till and Dörner, Reinhard and Demekhin, Philipp V.},
title={Nondipolar photoelectron angular distributions from fixed-in-space N₂ molecules},
journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
year={2024}
}
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2024-08-09T11:33:53Z 2024-08-09T11:33:53Z 2024-06-26 doi:10.17170/kobra-2024080210634 http://hdl.handle.net/123456789/15966 Gefördert im Rahmen eines Open-Access-Transformationsvertrags mit dem Verlag eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ photon interaction with molecules inner-shell photoionization molecular-frame angular distributions nondipole (retardation) effects 530 Nondipolar photoelectron angular distributions from fixed-in-space N₂ molecules Aufsatz We investigate experimentally and theoretically the N 1s photoionization of fixed-in-space N2 molecules at a photon energy of 880 eV. In our experiment, we employed circularly polarized synchrotron radiation for the photoionization and coincident electron and fragment-ion detection using cold target recoil ion momentum spectroscopy. The accompanying angle-resolved calculations were carried out by the multichannel single-center method and code within the frozen-core Hartree–Fock approximation. The computed emission distributions exhibit two distinct features along the molecular axis, which are the results of a superposition of the direct and nearest-neighbor scattering amplitudes for the photoemission from two nitrogen atoms. In the electric-dipole approximation, these peaks are symmetric with respect to both nitrogen atoms. Including nondipole (retardation) effects in the calculations results in a simultaneous increase and decrease of the scattering peaks towards the nitrogen atoms pointing in the forward and backward directions along the light propagation, respectively. These theoretical findings are in agreement with our experimental findings. open access Rezvan, Dmitrii V. Pier, Andreas Grundmann, Sven Novikovskiy, Nikolay M. Anders, Nils Kircher, Max Melzer, Niklas Trinter, Florian Schöffler, Markus S. Jahnke, Till Dörner, Reinhard Demekhin, Philipp V. doi:10.1088/1361-6455/ad5893 Photon Interaktion Molekül Fotoionisation Winkelverteilung Stickstoff publishedVersion eissn:1361-6455 Number 14 Journal of Physics B: Atomic, Molecular and Optical Physics Volume 57 false 145101
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