Search Results - "Thumm, U."

Attosecond time-resolved photoelectron dispersion and photoemission time delays by Liao, Q, Thumm, U

“…We compute spectrograms and relative time delays for laser-assisted photoemission by single attosecond extreme ultraviolet pulses from valence band (VB) and 2p…”
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Enhanced extreme ultraviolet high-harmonic generation from chromium-doped magnesium oxide by Nefedova, V. E., Fröhlich, S., Navarrete, F., Tancogne-Dejean, N., Franz, D., Hamdou, A., Kaassamani, S., Gauthier, D., Nicolas, R., Jargot, G., Hanna, M., Georges, P., Ciappina, M. F., Thumm, U., Boutu, W., Merdji, H.

“…High-order harmonic generation (HHG) from crystals is emerging as a new ultrashort source of coherent extreme ultraviolet (XUV) light. Doping the crystal…”
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Control of electron localization in deuterium molecular ions using an attosecond pulse train and a many-cycle infrared pulse by Singh, K P, He, F, Ranitovic, P, Cao, W, De, S, Ray, D, Chen, S, Thumm, U, Becker, A, Murnane, M M, Kapteyn, H C, Litvinyuk, I V, Cocke, C L

“…We demonstrate an experimental control of electron localization in deuterium molecular ions created and dissociated by the combined action of an attosecond…”
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Attosecond photoelectron spectroscopy of metal surfaces by Zhang, C-H, Thumm, U

“…Recent attosecond-streaking spectroscopy experiments [A. L. Cavalieri, Nature (London) 449, 1029 (2007)10.1038/nature06229] using copropagating extreme…”
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Ion-energy dependence of asymmetric dissociation of D2 by a two-color laser field by Ray, D, He, F, De, S, Cao, W, Mashiko, H, Ranitovic, P, Singh, K P, Znakovskaya, I, Thumm, U, Paulus, G G, Kling, M F, Litvinyuk, I V, Cocke, C L

“…Two-color (800 and 400 nm) short (45 fs) linearly polarized pulses are used to ionize and dissociate D2 into a neutral deuterium atom and a deuteron. The…”
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Electron-nuclear energy sharing in above-threshold multiphoton dissociative ionization of H2 by Wu, J, Kunitski, M, Pitzer, M, Trinter, F, Schmidt, L Ph H, Jahnke, T, Magrakvelidze, M, Madsen, C B, Madsen, L B, Thumm, U, Dörner, R

“…We report experimental observation of the energy sharing between electron and nuclei in above-threshold multiphoton dissociative ionization of H2 by strong…”
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Understanding the role of phase in chemical bond breaking with coincidence angular streaking by Wu, J., Magrakvelidze, M., Schmidt, L.P.H., Kunitski, M., Pfeifer, T., Schöffler, M., Pitzer, M., Richter, M., Voss, S., Sann, H., Kim, H., Lower, J., Jahnke, T., Czasch, A., Thumm, U., Dörner, R.

“…Electron motion in chemical bonds occurs on an attosecond timescale. This ultrafast motion can be driven by strong laser fields. Ultrashort asymmetric laser…”
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Semi‐natural grassland biomass for combustion: influence of botanical composition, harvest date and site conditions on fuel composition by Tonn, B, Thumm, U, Claupein, W

“…Bioenergy generation by combustion is an alternative utilization of biomass from semi‐natural grasslands no longer needed for forage production. Variability of…”
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Complete characterization of molecular dynamics in ultrashort laser fields by Feuerstein, B, Ergler, Th, Rudenko, A, Zrost, K, Schröter, C D, Moshammer, R, Ullrich, J, Niederhausen, T, Thumm, U

“…Reaction Microscope-based, complete, and time-resolved Coulomb explosion imaging of vibrating and dissociating D(2)(+) molecules with femtosecond…”
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Quantum-beat analysis of the rotational–vibrational dynamics in D 2 by Winter, M, Schmidt, R, Thumm, U

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Steering the nuclear motion in singly ionized argon dimers with mutually detuned laser pulses by Wu, J, Magrakvelidze, M, Vredenborg, A, Schmidt, L Ph H, Jahnke, T, Czasch, A, Dörner, R, Thumm, U

“…We demonstrate that the vibrational nuclear motion of singly ionized argon dimers can be controlled with two ultrashort laser pulses of different wavelengths…”
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Electron-ion interaction effects in attosecond time-resolved photoelectron spectra by Zhang, C.-H., Thumm, U.

“…Photoionization by attosecond extreme ultraviolet (xuv) pulses into the laser-dressed continuum of the ionized atom is commonly described in strong-field…”
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Influence of leaching on the chemical composition of grassland biomass for combustion by Tonn, B., Dengler, V., Thumm, U., Piepho, H.-P., Claupein, W.

“…Bioenergy production from grassland biomass is an alternative use for semi‐natural grasslands, but chemical composition of grassland herbage can limit its…”
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Time-resolved photoimaging of image-potential states in carbon nanotubes by ZAMKOV, M, WOODY, N, BING, S, CHAKRABORTY, H. S, CHANG, Z, THUMM, U, RICHARD, P

“…The first experimental evidence for the existence of image-potential states in carbon nanotubes is presented. The observed features constitute a new class of…”
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Dissociation dynamics of noble-gas dimers in intense two-color IR laser fields by Magrakvelidze, M., Thumm, U.

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Dissociation dynamics of diatomic molecules in intense laser fields: A scheme for the selection of relevant adiabatic potential curves by Magrakvelidze, M., Aikens, C. M., Thumm, U.

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Streaking and Wigner time delays in photoemission from atoms and surfaces by Zhang, C.-H., Thumm, U.

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Electron transfer and orbital hybridization in slow collisions between excited hydrogen atoms and aluminum surfaces by Bahrim, B., Thumm, U.

“…We have developed a new two-center close-coupling approach in which the time-dependent Schrödinger equation is solved for an active electron interacting with a…”
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Size quantization effects in atomic level broadening near thin metallic films by Thumm, U., Institute for Theoretical Atomic and Molecular Physics, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, Kuerpick, P., Wille, U.

“…The broadening of atomic levels near thin metallic films is studied theoretically within the fixed-atom approximation. First-order level widths are calculated…”
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Boundary conditions for the Pauli equation: application to photodetachment of Cs by Bahrim, C, Fabrikant, I I, Thumm, U

“…We formulate the boundary conditions near the atomic nucleus for solving the Pauli equation, based on the analytic solution of the Dirac equation for a Coulomb…”
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