Photoelectron spectroscopy of laser-dressed atomic helium
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Bondy, A
Schnorr, K
Augustin, S
Lindenblatt, H
Trost, F
Xie, X
Braune, M
Treusch, R
Manschwetus, B
Schirmel, N
Redlin, H
Douguet, N
Bartschat, K
et al.
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Abstract
Photoelectron emission from excited states of laser-dressed atomic helium is analyzed with respect to laser intensity-dependent excitation energy shifts and angular distributions. In the two-color exteme ultraviolet (XUV)-infrared (IR) measurement, the XUV photon energy is scanned between 20.4 eV and the ionization threshold at 24.6 eV, revealing electric dipole-forbidden transitions for a temporally overlapping IR pulse (≈1012Wcm-2). The interpretation of the experimental results is supported by numerically solving the time-dependent Schrödinger equation in a single-active-electron approximation.
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Physical Review A
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102
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6
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© The Author(s) 2020. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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Atomic, molecular and optical physics
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Meister, S; Bondy, A; Schnorr, K; Augustin, S; Lindenblatt, H; Trost, F; Xie, X; Braune, M; Treusch, R; Manschwetus, B; Schirmel, N; Redlin, H; Douguet, N; Pfeifer, T; Bartschat, K; Moshammer, R, Photoelectron spectroscopy of laser-dressed atomic helium, Physical Review A, 2020, 102 (6), pp. 062809