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6 results on '"Schoffler, M S"'

1. Photo Double Ionization of Helium 100 eV and 450 eV above Threshold: II. Circularly Polarized Light

Author

Knapp, A, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, Dorner, R, Knapp, A, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, and Dorner, R

Abstract

We present a joint experimental and theoretical study of the fully differential cross section of the photo double ionization of helium with left and right circularly polarized light at Eexc= 100 eV and 450 eV above the threshold. We analyse angular distributions for the slow electron and the normalized circular dichroism for various energy sharings of the excess energy between the two electrons. The experimental results are well reproduced by convergent close coupling calculations.

Published
2005

2. Photo Double Ionization of Helium 100 eV and 450 eV above Threshold: I. Linearly Polarized Light

Author

Knapp, A, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, Dorner, R, Knapp, A, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, and Dorner, R

Abstract

We present a joint experimental and theoretical study for the fully differential cross section of the photo double ionization (PDI) of helium with linearly polarized light at the excess energies Eexc = 100 eV and 450 eV above the threshold. The fully differential cross section is obtained by measuring the three-dimensional momentum vectors of one electron and the He2+ ion in coincidence using the COLTRIMS method. We give an overview of the momentum distribution of the three-body continuum 100 eV above the threshold. We show angular distributions for both electrons for various energy sharings at Eexc = 100 eV and 450 eV. The experimental results are well reproduced by a set of convergent close-coupling (CCC) calculations.

Published
2005

3. Revealing the Effect of Angular Correlation in the Ground-state He Wavefunction: A Coincidence Study of the Transfer Ionization Process

Author

Schoffler, M S, Godunov, A L, Whelan, C T, Walters, H R J, Schipakov, V S, Mergel, V, Dorner, R, Jagutski, O., Schmidt, L Ph H, Titze, J, Weigold, Erich, Schmidt-Böcking, H, Schoffler, M S, Godunov, A L, Whelan, C T, Walters, H R J, Schipakov, V S, Mergel, V, Dorner, R, Jagutski, O., Schmidt, L Ph H, Titze, J, Weigold, Erich, and Schmidt-Böcking, H

Abstract

A joint theoretical-experimental study of the transfer ionization process p + He → H0 + He2+ + e- is presented. For the first time all particles in the final state have been detected in triple coincidence. This fully differential measurement is in good

Published
2005

4. Many-particle Fragmentation Processes in Atomic and Molecular Physics - New Insight into the World of Correlation

Author

Schmidt-Böcking, H, Schoffler, M S, Jahnke, T., Czasch, A O, Mergel, V, Schmidt, L Ph H, Dorner, R, Jagutski, O., Hattass, M., Weber, Thorsten, Weigold, Erich, Schmidt, H T, Schuch, R, Cederquist, H., Demkov, Y., Whelan, C T, Godunov, A L, Walters, J, Schmidt-Böcking, H, Schoffler, M S, Jahnke, T., Czasch, A O, Mergel, V, Schmidt, L Ph H, Dorner, R, Jagutski, O., Hattass, M., Weber, Thorsten, Weigold, Erich, Schmidt, H T, Schuch, R, Cederquist, H., Demkov, Y., Whelan, C T, Godunov, A L, and Walters, J

Abstract

Correlated many-particle dynamics in Coulombic systems, which is one of the unsolved fundamental problems in AMO-physics, can now be experimentally approached with so far unprecedented completeness and precision. The recent development of the COLTRIMS technique (COLd Target Recoil Ion Momentum Spectroscopy) provides a coincident multi-fragment imaging technique for eV and sub-eV fragment detection. In its completeness it is as powerful as the bubble chamber in high energy physics. In recent benchmark experiments quasi snapshots (duration as short as an attosecond) of the correlated dynamics between electrons and nuclei have been made for atomic and molecular objects. This new imaging technique has opened a powerful observation window into the hidden world of many-particle dynamics.

Published
2005

5. Photo Double Ionizaton of Helium 100 eV and 450 eV above Threshold: III. Gerade and Ungerade Amplitudes and their Relative Phases

Author

Knapp, A, Krassig, B, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, Dorner, R, Knapp, A, Krassig, B, Kheifets, Anatoli, Bray, Igor, Weber, Thorsten, Landers, A L, Schossler, S, Jahnke, T., Nickles, J, Kammer, S, Jagutski, O., Schmidt, L Ph H, Schoffler, M S, Osipov, T, Prior, M H, Schmidt-Böcking, H, Cocke, C L, and Dorner, R

Abstract

We present a joint experimental and theoretical study of the gerade and ungerade amplitudes of the photo double ionization of helium at excess energies of 100 eV and 450 eV above the threshold. We describe a method of extracting the amplitudes from a COLTRIMS data set. The experimental results are well reproduced by convergent close-coupling (CCC) calculations. The fully differential cross section data underlying this study can be found in our companion papers immediately preceding this one.

Published
2005

6. Many-Particle Dynamics in Atomic and Molecular Physics Investigated with the COLTRIMS-Technique: New Inside into e-e- Correction

Author

Schmidt-Böcking, H, Dorner, R, Jagutski, O., Jahnke, T., Mergel, V, Schmidt, L Ph H, Weber, Thorsten, Czasch, A O, Wimmer, C, Hattass, M., Knapp, A, Schoffler, M S, Cocke, C L, Prior, Michael, Kheifets, Anatoli, Weigold, Erich, Afaneh, F, Schmidt-Böcking, H, Dorner, R, Jagutski, O., Jahnke, T., Mergel, V, Schmidt, L Ph H, Weber, Thorsten, Czasch, A O, Wimmer, C, Hattass, M., Knapp, A, Schoffler, M S, Cocke, C L, Prior, Michael, Kheifets, Anatoli, Weigold, Erich, and Afaneh, F

Published
2004

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