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Analysis Of Two-Dimensional High-Energy Photoelectron Momentum Distributions In The Single Ionization Of Atoms By Intense Laser Pulses, Zhangjin Chen, Toru Morishita, Anh-Thu Le, C. D. Lin
Analysis Of Two-Dimensional High-Energy Photoelectron Momentum Distributions In The Single Ionization Of Atoms By Intense Laser Pulses, Zhangjin Chen, Toru Morishita, Anh-Thu Le, C. D. Lin
Physics Faculty Research & Creative Works
We analyzed the two-dimensional (2D) electron momentum distributions of high-energy photoelectrons of atoms in an intense laser field using the second-order strong field approximation (SFA2). The SFA2 accounts for the rescattering of the returning electron with the target ion to first order and its validity is established by comparing with results obtained by solving the time-dependent Schrödinger equation for short pulses. By analyzing the SFA2 theory, we confirmed that the yield along the back rescattered ridge in the 2D momentum spectra can be interpreted as due to the elastic scattering in the backward directions by the returning electron wave packet. …
Few-Photon Multiple Ionization Of Ne And Ar By Strong Free-Electron-Laser Pulses, Robert Moshammer, Yuhai Jiang, L. Foucar, Artem Rudenko, Th. Ergler, Claus Dieter Schroter, S. Ludemann, Karl Zrost, Daniel Fischer, J. Titze, Till Jahnke, Markus S. Schoffler, Th Weber, Reinhard Dorner, Theo J.M. Zouros, Alexander Dorn, T. Ferger, Kai Uwe Kuhnel, S. Dusterer, R. Treusch, Paul Radcliffe, Elke Plonjes, Joachim Hermann Ullrich
Few-Photon Multiple Ionization Of Ne And Ar By Strong Free-Electron-Laser Pulses, Robert Moshammer, Yuhai Jiang, L. Foucar, Artem Rudenko, Th. Ergler, Claus Dieter Schroter, S. Ludemann, Karl Zrost, Daniel Fischer, J. Titze, Till Jahnke, Markus S. Schoffler, Th Weber, Reinhard Dorner, Theo J.M. Zouros, Alexander Dorn, T. Ferger, Kai Uwe Kuhnel, S. Dusterer, R. Treusch, Paul Radcliffe, Elke Plonjes, Joachim Hermann Ullrich
Physics Faculty Research & Creative Works
Few-photon multiple ionization of Ne and Ar atoms by strong vacuum ultraviolet laser pulses from the free-electron laser at Hamburg was investigated differentially with the Heidelberg reaction microscope. The light-intensity dependence of Ne2+ production reveals the dominance of nonsequential two-photon double ionization at intensities of I< 6 x 1012W/cm2 and significant contributions of three-photon ionization as I increases. Ne2+ recoil-ion-momentum distributions suggest that two electrons absorbing "instantaneously" two photons are ejected most likely into opposite hemispheres with similar energies.