Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 47, Issue 19, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0953-4075/47/19/195601
Keywords
two-photon double ionization; free electron lasers; circularly polarized radiation; angular distribution of photoelectrons; noble gases; non-dipole effects
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Funding
- Russian Foundation for Basic Research (RFBR) [12-02-01123]
- Dynasty Foundation
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Photoelectron angular distributions (PADs) and angular correlations between two emitted electrons in sequential two-photon double ionization (2PDI) of atoms by circularly polarized radiation are studied theoretically. In particular, the sequential 2PDI of the valence np(6) shell in noble gas atoms (neon, argon, krypton) is analyzed, accounting for the first-order corrections to the dipole approximation. Due to different selection rules in ionization transitions, the circular polarization of photons causes some new features of the cross sections, PADs and angular correlation functions in comparison with the case of linearly polarized photons.
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