Results 11 to 20 of about 182 (168)

Non-sequential double ionization of Ar: from the single- to the many-cycle regime

New Journal of Physics, 2014
The transition from the near-single to the multi-cycle regime in non-sequential double ionization of argon is investigated experimentally. Argon atoms are exposed to intense laser pulses with a center wavelength around 790 nm and the momenta of electrons
M Kübel, K J Betsch, Nora G Kling, A S Alnaser, J Schmidt, U Kleineberg, Y Deng, I Ben-Itzhak, G G Paulus, T Pfeifer, J Ullrich, R Moshammer, M F Kling, B Bergues   +13 more
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Nonsequential double ionization of molecules [PDF]

Physical Review A, 2005
7 pages, 7 figures, submitted to ...
Prauzner-Bechcicki, Jakub, Sacha, Krzysztof, Eckhardt, B, Zakrzewski, Jakub   +3 more
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Attosecond tracing of correlated electron-emission in non-sequential double ionization [PDF]

Nature Communications, 2012
Despite their broad implications for phenomena such as molecular bonding or chemical reactions, our knowledge of multi-electron dynamics is limited and their theoretical modelling remains a most difficult task. From the experimental side, it is highly desirable to study the dynamical evolution and ...
Bergues, Boris, Kübel, Matthias, Johnson, Nora G., Fischer, Bettina, Camus, Nicolas, Betsch, Kelsie J., Herrwerth, Oliver, Senftleben, Arne, Sayler, A. Max, Rathje, Tim, Pfeifer, Thomas, Ben-Itzhak, Itzik, Jones, Robert R., Paulus, Gerhard G., Krausz, Ferenc, Moshammer, Robert, Ullrich, Joachim, Kling, Matthias F.   +17 more
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Laser-induced non-sequential double ionization investigated at and below the threshold for electron impact ionization [PDF]

Journal of Physics B: Atomic, Molecular and Optical Physics, 2003
We use correlated electron–ion momentum measurements to investigate laser-induced non-sequential double ionization of Ar and Ne. Light intensities are chosen in a regime at and below the threshold where, within the rescattering model, electron impact ionization of the singly charged ion core is expected to become energetically forbidden.
Eremina, E., Liu, X., Rottke, H., Sandner, W., Dreischuh, A., Lindner, F., Grasbon, F., Paulus, G., Walther, H., Moshammer, R., Feuerstein, B., Ullrich, J.   +11 more
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Fingerprints of slingshot non-sequential double ionization on two-electron probability distributions [PDF]

Scientific Reports, 2019
AbstractWe study double ionization of He driven by near-single-cycle laser pulses at low intensities at 400 nm. Using a three-dimensional semiclassical model, we identify the pathways that prevail non-sequential double ionization (NSDI). We focus mostly on the delayed pathway, where one electron ionizes with a time-delay after recollision.
Katsoulis, GP, Emmanouilidou, A
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Direct versus delayed pathways in strong-field non-sequential double ionization [PDF]

New Journal of Physics, 2011
We report full-dimensionality quantum and classical calculations for double ionization of laser-driven helium at 390 nm. Good qualitative agreement is observed. We show that the classical double ionization trajectories can be divided into two distinct pathways: direct and delayed.
Emmanouilidou, A., Parker, Jonathan, Moore, Laura, Taylor, Kenneth   +3 more
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Phase-locking mechanism in non-sequential double ionization [PDF]

Applied Physics B, 2019
Here, we identify a new mechanism where the early stage of electron ionization in the field of strong femtosecond laser pulse determines the final yield of non-sequential double ionization. By using simple trajectory methods we prove that the powerful short wavelength laser field causes an injection locking between its phase and the phases of the ...
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Carrier-envelope-phase tagging in measurements with long acquisition times

New Journal of Physics, 2012
We present a detailed analysis of the systematic errors that affect single-shot carrier envelope phase (CEP) measurements in experiments with long acquisition times, for which only limited long-term laser stability can be achieved.
M Kübel, K J Betsch, Nora G Johnson, U Kleineberg, R Moshammer, J Ullrich, G G Paulus, M F Kling, B Bergues   +8 more
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Molecular rotation assisted non-sequential double ionization

, 2022
A molecular rotation assisted non-sequential double ionization (MR-NSDI) mechanism is identified in the breakup of rotational H$_2$ molecules in a few-cycle intense laser pulse using a semi-classical trajectory Monte Carlo method. Applying a molecular source in an appropriate rotational state could intensively boost NSDI probability, and conclude with ...
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Non-sequential double ionization of Ne in intense laser pulses: a coincidence experiment

Optics Express, 2001
The dynamics of Neon double ionization by 25 fs, 1.0 PW/cm 2 laser pulses at 795 nm has been studied in a many particle coincidence experiment. The momentum vectors of all ejected atomic fragments (electrons and ions) have been measured using combined electron and recoil-ion momentum spectroscopy.
Moshammer, R., Feuerstein, B., Fischer, D., Dorn, A., Schröter, C., Deipenwisch, J., Crespo López-Urrutia, J., Höhr, C., Neumayer, P., Ullrich, J., Rottke, H., Trump, C., Wittmann, M., Korn, G., Sandner, W.   +14 more
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