TY  - JOUR
A1  - Grundmann, Sven Eric
A1  - Trinter, Florian
A1  - Fang, Yong-Kang
A1  - Fehre, Kilian
A1  - Strenger, Nico
A1  - Pier, Andreas
A1  - Kaiser, Leon
A1  - Kircher, Max
A1  - Peng, Liang-You
A1  - Jahnke, Till
A1  - Dörner, Reinhard
A1  - Schöffler, Markus S.
T1  - Quasifree photoionization under the reaction microscope
T2  - Atoms
N2  - 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.
KW  - two-electron systems
KW  - one-photon double ionization
KW  - many-electron correlation
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71612
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-716129
SN  - 2218-2004
N1  - This project was funded by DFG and BMBF.
VL  - 10
IS  - 3, art. 68
SP  - 1
EP  - 8
PB  - MDPI
CY  - Basel
ER  -