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 2p 53s 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.
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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.
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Douguet, N., Gryzlova, E.V., Staroselskaya, E.I. et al. Photoelectron angular distribution in two-pathway ionization of neon with femtosecond XUV pulses. Eur. Phys. J. D 71, 105 (2017). https://doi.org/10.1140/epjd/e2017-70695-7
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DOI: https://doi.org/10.1140/epjd/e2017-70695-7