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Feuerstein B, Moshammer R, Fischer D, et al. Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: the role of excitation tunneling. Phys Rev Lett. 2001;87(4):043003doi: 10.1103/PhysRevLett.87.043003.
Feuerstein, B., Moshammer, R., Fischer, D., Dorn, A., Schröter, C. D., Deipenwisch, J., Crespo Lopez-Urrutia, J. R., Höhr, C., Neumayer, P., Ullrich, J., Rottke, H., Trump, C., Wittmann, M., Korn, G., & Sandner, W. (2001). Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: the role of excitation tunneling. Physical review letters, 87(4), 043003. https://doi.org/10.1103/PhysRevLett.87.043003
Feuerstein, B, et al. "Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: the role of excitation tunneling." Physical review letters vol. 87,4 (2001): 043003. doi: https://doi.org/10.1103/PhysRevLett.87.043003
Feuerstein B, Moshammer R, Fischer D, Dorn A, Schröter CD, Deipenwisch J, Crespo Lopez-Urrutia JR, Höhr C, Neumayer P, Ullrich J, Rottke H, Trump C, Wittmann M, Korn G, Sandner W. Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: the role of excitation tunneling. Phys Rev Lett. 2001 Jul 23;87(4):043003. doi: 10.1103/PhysRevLett.87.043003. Epub 2001 Jul 09. PMID: 11461614.
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Phys Rev Lett. 2001 Jul 23;87(4):043003. doi: 10.1103/PhysRevLett.87.043003. Epub 2001 Jul 09.

Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: the role of excitation tunneling.

Physical review letters

B Feuerstein, R Moshammer, D Fischer, A Dorn, C D Schröter, J Deipenwisch, J R Crespo Lopez-Urrutia, C Höhr, P Neumayer, J Ullrich, H Rottke, C Trump, M Wittmann, G Korn, W Sandner

Affiliations

  1. Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany.

PMID: 11461614 DOI: 10.1103/PhysRevLett.87.043003

Abstract

Vector momentum distributions of two electrons created in double ionization of Ar by 25 fs, 0.25 PW/cm(2) laser pulses at 795 nm have been measured using a "reaction microscope." At this intensity, where nonsequential ionization dominates, distinct correlation patterns are observed in the two-electron momentum distributions. A kinematical analysis of these spectra within the classical "recollision model" revealed an (e,2e)-like process and excitation with subsequent tunneling of the second electron as two different ionization mechanisms. This allows a qualitative separation of the two mechanisms demonstrating that excitation-tunneling is the dominant contribution to the total double ionization yield.

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