Observation of Nondipole-Induced Asymmetry in the Angular Emission Distribution 
of Photoelectrons from Fixed-in-Space CO Molecules

Rezvan, D. V.; Klyssek, K.; Grundmann, S.; Pier, A.; Novikovskiy, N. M.; Strenger, N.; Tsitsonis, D.; Kircher, M.; Vela-Peréz, I.; Fehre, K.; Trinter, Florian; Schöffler, M. S.; Jahnke, T.; Dörner, R.; Demekhin, Ph. V.

doi:10.1103/PhysRevLett.129.253201

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Observation of Nondipole-Induced Asymmetry in the Angular Emission Distribution of Photoelectrons from Fixed-in-Space CO Molecules

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Trinter, Florian
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Rezvan, D., Klyssek, K., Grundmann, S., Pier, A., Novikovskiy, N., Strenger, N., et al. (2022). Observation of Nondipole-Induced Asymmetry in the Angular Emission Distribution of Photoelectrons from Fixed-in-Space CO Molecules. Physical Review Letters, 129(25): 253201. doi:10.1103/PhysRevLett.129.253201.

Cite as: https://hdl.handle.net/21.11116/0000-000C-03CD-A

Abstract

We investigate experimentally and theoretically the C and O 1s photoionization of fixed-in-space CO molecules at a photon energy of 905 eV. We find a significant dependence of the photoelectron angular distributions on the direction of propagation of the ionizing radiation. It results from an interplay of nondipole effects, on one hand, and molecular effects, on the other. The nondipole effects lead to an increase of the emission probability in the forward direction along the light propagation, and the photoelectron wave being scattered by the molecular potential gives rise to a strong peak in the direction of the atom neighboring the emitter site. These effects can either conspire or extenuate each other, depending on the photoelectron emission direction and molecular orientation in space.