Coulomb singularity in the transverse momentum distribution for strong-field 
single ionization

Rudenko, A.; Zrost, K.; Ergler, Th.; Voitkiv, A. B.; Najjari, B.; de Jesus, V. L. B.; Feuerstein, B.; Schröter, C. D.; Moshammer, R.; Ullrich, J.

doi:10.1088/0953-4075/38/11/L01

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Coulomb singularity in the transverse momentum distribution for strong-field single ionization

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Rudenko, A.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Zrost, K.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ergler, Th.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Voitkiv, A. B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Najjari, B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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de Jesus, V. L. B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Feuerstein, B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Schröter, C. D.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Moshammer, R.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich, J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Citation

Rudenko, A., Zrost, K., Ergler, T., Voitkiv, A. B., Najjari, B., de Jesus, V. L. B., et al. (2005). Coulomb singularity in the transverse momentum distribution for strong-field single ionization. Journal of Physics B, 38(11), L191-L198. doi:10.1088/0953-4075/38/11/L01.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-88F0-D

Abstract

We present high-resolution momentum distributions of ions and electrons created in single ionization of He, Ne and Ar targets by intense (0.15-2 PW cm - 2) short-pulsed (25 fs) linearly polarized laser fields in the direction perpendicular to the polarization. Instead of a Gaussian shape predicted by standard tunnelling theory, the experimental data exhibit a sharp cusp-like peak at zero transverse momentum. The comparison of experimental data with (i) calculations performed within the strong-field approximation employing a Coulomb-Volkov wavefunction to model the final electron state and (ii) results of recent semiclassical calculations, shows that the `cusp' appears due to the long-range Coulomb interaction between the emitted electron and the remaining ion. A similar structure was previously observed for ion-atom collisions.