Quasifree photoionization under the reaction microscope

  • We experimentally investigated the quasifree mechanism (QFM) in one-photon double ionization of He and H2 at 800 eV photon energy and circular polarization with a COLTRIMS reaction microscope. Our work provides new insight into this elusive photoionization mechanism that was predicted by Miron Amusia more than four decades ago. We found the distinct four-fold symmetry in the angular emission pattern of QFM electrons from H2 double ionization that has previously only been observed for He. Furthermore, we provide experimental evidence that the photon momentum is not imparted onto the center of mass in quasifree photoionization, which is in contrast to the situation in single ionization and in double ionization mediated by the shake-off and knock-out mechanisms. This finding is substantiated by numerical results obtained by solving the system’s full-dimensional time-dependent Schrödinger equation beyond the dipole approximation.

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Author:Sven Eric GrundmannORCiDGND, Florian TrinterORCiDGND, Yong-Kang Fang, Kilian FehreORCiDGND, Nico Strenger, Andreas Pier, Leon Kaiser, Max KircherORCiD, Liang-You PengORCiD, Till JahnkeORCiDGND, Reinhard DörnerORCiDGND, Markus S. SchöfflerORCiDGND
Parent Title (English):Atoms
Place of publication:Basel
Document Type:Article
Date of Publication (online):2022/06/28
Date of first Publication:2022/06/28
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/01/24
Tag:many-electron correlation; one-photon double ionization; two-electron systems
Issue:3, art. 68
Article Number:68
Page Number:8
First Page:1
Last Page:8
This project was funded by DFG and BMBF.
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International