https://doi.org/10.1140/epjd/e2017-70695-7
Regular Article
Photoelectron angular distribution in two-pathway ionization of neon with femtosecond XUV pulses*
1 Department of Physics and Astronomy, Drake University, Des Moines, 50311 Iowa, USA
2 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
3 Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
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Received: 7 November 2016
Received in final form: 18 January 2017
Published online: 18 May 2017
Abstract
We analyze the photoelectron angular distribution in two-pathway interference between nonresonant one-photon and resonant two-photon ionization of neon. We consider a bichromatic femtosecond XUV pulse whose fundamental frequency is tuned near the 2p53s atomic states of neon. The time-dependent Schrödinger equation is solved and the results are employed to compute the angular distribution and the associated anisotropy parameters at the main photoelectron line. We also employ a time-dependent perturbative approach, which allows obtaining information on the process for a large range of pulse parameters, including the steady-state case of continuous radiation, i.e., an infinitely long pulse. The results from the two methods are in relatively good agreement over the domain of applicability of perturbation theory.
Contribution to the Topical Issue “Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces”, edited by A.N. Grum-Grzhimailo, E.V. Gryzlova, Yu V. Popov, and A.V. Solov’yov.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2017
