The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform

Kaoru Yamanouchi - One of the best experts on this subject based on the ideXlab platform.

  • observation of laser assisted Electron Atom scattering in femtosecond intense laser fields
    Physical Review Letters, 2010
    Co-Authors: Reika Kanya, Yuya Morimoto, Kaoru Yamanouchi
    Abstract:

    Laser-assisted Electron scattering (LAES) in a femtosecond near-infrared intense laser field was observed through the scattering of 1 keV Electrons by xenon Atoms. The intensities, angular distributions, and laser polarization dependence of the observed LAES signals for the energy gain ($+\ensuremath{\hbar}\ensuremath{\omega}$) and energy loss ($\ensuremath{-}\ensuremath{\hbar}\ensuremath{\omega}$) processes were interpreted well by numerical simulations. As an application of this femtosecond-LAES process, a new method of time-resolved gas Electron diffraction for probing geometrical change of molecules with high precision is proposed.

V.v. Volovich - One of the best experts on this subject based on the ideXlab platform.

  • Photon polarization effects in laser-assisted Electron-Atom scattering
    ICONO '95: Fundamentals of Laser-Matter Interaction, 1996
    Co-Authors: N. L. Manakov, S.i. Marmo, V.v. Volovich
    Abstract:

    ABSTRACT The differential cross sections of Electron-Atom collisions in a radiation field are different for right and left circular polarization of field. Simple expression for the dichroism in one-photon Electron-Atom scattering and spontaneous brenisstrahlung is presented. The numerical estimation of dichroism for one-photon Coulomb scattering shows thatthe effect may be observed experimentally. 1. INTRODUCTiON In the early experiments on interaction of laser radiation with Atoms, the linear-polarized radiation was used as a rule, and polarization dependence of cross sections was not investigated. At present, the specific effects caused by polarization of radiation are rather well studied for bound-free and bound-bound transitions of Electron, such as multiphoton ionization, level shift and splitting, optical harmonic generation."2 However, in free-free transitionsof Electron-Atom systems (for example, the stimulated bremsstrahlung and absorption) polarization effects have notbeen analyzed in detail.3

  • Photon polarization effects in bremsstrahlung and laser-assisted Electron-Atom scattering
    Journal of Electron Spectroscopy and Related Phenomena, 1996
    Co-Authors: N. L. Manakov, S.i. Marino, V.v. Volovich
    Abstract:

    Abstract The differential cross sections of free-free Electron-Atom transitions in a radiation field are different for right and left circular polarization of the field. A simple expression for the dichroism in spontaneous bremsstrahlung and one-photon Electron-Atom scattering is presented. The numerical estimation of dichroism shows that the effect can be observed experimentally.

  • Circular dichroism in laser-assisted Electron-Atom scattering
    Physics Letters A, 1995
    Co-Authors: N. L. Manakov, S.i. Marmo, V.v. Volovich
    Abstract:

    Abstract The differential cross sections of Electron-Atom collisions in a radiation field are different for right and left circular polarizations of the field. A simple expression for the dichroism in one-photon Electron-Atom scattering and spontaneous bremsstrahlung is presented. The numerical estimation of the dichroism for one-photon Coulomb scattering shows that the effect may be observed experimentally.

N. L. Manakov - One of the best experts on this subject based on the ideXlab platform.

  • Rescattering effects in laser-assisted Electron–Atom bremsstrahlung
    Journal of Physics B, 2015
    Co-Authors: A. N. Zheltukhin, N. L. Manakov, A. V. Flegel, M. V. Frolov, Anthony F. Starace
    Abstract:

    Rescattering effects in nonresonant spontaneous laser-assisted Electron-Atom bremsstrahlung (LABrS) are analyzed within the framework of time-dependent effective-range (TDER) theory. It is shown that high energy LABrS spectra exhibit rescattering plateau structures that are similar to those that are wellknown in strong field laser-induced processes as well as those that have been predicted theoretically in laser-assisted collision processes. In the limit of a lowfrequency laser field, an analytic description of LABrS is obtained from a rigorous quantum analysis of the exact TDER results for the LABrS amplitude. This amplitude is represented as a sum of factorized terms involving three factors, each having a clear physical meaning. The first two factors are the exact field-free amplitudes for Electron-Atom bremsstrahlung and for Electron-Atom scattering, and the third factor describes free Electron motion in the laser field along a closed trajectory between the first (scattering) and second (rescattering) collision events. Finally, a generalization of these TDER results to the case of LABrS in a Coulomb field is discussed.

  • Photon polarization effects in laser-assisted Electron-Atom scattering
    ICONO '95: Fundamentals of Laser-Matter Interaction, 1996
    Co-Authors: N. L. Manakov, S.i. Marmo, V.v. Volovich
    Abstract:

    ABSTRACT The differential cross sections of Electron-Atom collisions in a radiation field are different for right and left circular polarization of field. Simple expression for the dichroism in one-photon Electron-Atom scattering and spontaneous brenisstrahlung is presented. The numerical estimation of dichroism for one-photon Coulomb scattering shows thatthe effect may be observed experimentally. 1. INTRODUCTiON In the early experiments on interaction of laser radiation with Atoms, the linear-polarized radiation was used as a rule, and polarization dependence of cross sections was not investigated. At present, the specific effects caused by polarization of radiation are rather well studied for bound-free and bound-bound transitions of Electron, such as multiphoton ionization, level shift and splitting, optical harmonic generation."2 However, in free-free transitionsof Electron-Atom systems (for example, the stimulated bremsstrahlung and absorption) polarization effects have notbeen analyzed in detail.3

  • Photon polarization effects in bremsstrahlung and laser-assisted Electron-Atom scattering
    Journal of Electron Spectroscopy and Related Phenomena, 1996
    Co-Authors: N. L. Manakov, S.i. Marino, V.v. Volovich
    Abstract:

    Abstract The differential cross sections of free-free Electron-Atom transitions in a radiation field are different for right and left circular polarization of the field. A simple expression for the dichroism in spontaneous bremsstrahlung and one-photon Electron-Atom scattering is presented. The numerical estimation of dichroism shows that the effect can be observed experimentally.

  • Circular dichroism in laser-assisted Electron-Atom scattering
    Physics Letters A, 1995
    Co-Authors: N. L. Manakov, S.i. Marmo, V.v. Volovich
    Abstract:

    Abstract The differential cross sections of Electron-Atom collisions in a radiation field are different for right and left circular polarizations of the field. A simple expression for the dichroism in one-photon Electron-Atom scattering and spontaneous bremsstrahlung is presented. The numerical estimation of the dichroism for one-photon Coulomb scattering shows that the effect may be observed experimentally.

Reika Kanya - One of the best experts on this subject based on the ideXlab platform.

  • observation of laser assisted Electron Atom scattering in femtosecond intense laser fields
    Physical Review Letters, 2010
    Co-Authors: Reika Kanya, Yuya Morimoto, Kaoru Yamanouchi
    Abstract:

    Laser-assisted Electron scattering (LAES) in a femtosecond near-infrared intense laser field was observed through the scattering of 1 keV Electrons by xenon Atoms. The intensities, angular distributions, and laser polarization dependence of the observed LAES signals for the energy gain ($+\ensuremath{\hbar}\ensuremath{\omega}$) and energy loss ($\ensuremath{-}\ensuremath{\hbar}\ensuremath{\omega}$) processes were interpreted well by numerical simulations. As an application of this femtosecond-LAES process, a new method of time-resolved gas Electron diffraction for probing geometrical change of molecules with high precision is proposed.

A. V. Tolokonnikov - One of the best experts on this subject based on the ideXlab platform.

  • INVESTIGATION OF THE BOUNDARY CONDITIONS INFLUENCE ON THE GROUND STATE PROPERTIES OF A TWO-Electron Atom IN A CAVITY
    2020
    Co-Authors: A. V. Tolokonnikov
    Abstract:

    Summary. The conditions under which the two-Electron Atom with Atomic number ൒ 2 placed in the spherical cavity could either be in stable state or decay into the one-Electron Atom with same Atomic number and an Electron are studied. It is shown that the binding and ionization energies of the two-Electron Atom in a cavity with certain parameters of its boundary could be substantially bigger than the corresponding energies of the free one, which means that effective containers for such Atoms can exist. By analogy with the Wigner-Seitz model the possibility of interpreting of such cavities as a kind of the Wigner-Seitz cells and forming a spatial lattice of such cavities filled by the two-Electron Atoms is discussed.

  • Boundary conditions effects on the ground state of a two-Electron Atom in a vacuum cavity
    American Journal of Modern Physics, 2020
    Co-Authors: A. V. Tolokonnikov
    Abstract:

    The ground state properties of the two-Electron Atom with Atomic number in the spherical vacuum cavity with general boundary conditions of “not going out” are studied. It is shown that for certain parameters of the cavity such Atom could either decay into the one-Electron Atom with the same Atomic number and an Electron or be in stable state with the binding and ionization energies several times bigger than the same energies of the free Atom. By analogy with the Wigner-Seitz model of metallic bonding, the possibility of the existence of such effects on the lattice formed by the vacuum cavities filled with the two-Electron Atoms of the same type is discussed.

  • Boundary conditions effects on the ground state of a two-Electron Atom in a vacuum cavity
    arXiv: Atomic Physics, 2014
    Co-Authors: A. V. Tolokonnikov
    Abstract:

    The ground state properties of the two-Electron Atom with Atomic number $Z\geq 2$ in the spherical vacuum cavity with general boundary conditions of "not going out" are studied. It is shown that for certain parameters of the cavity such Atom could either decay into the one-Electron Atom with the same Atomic number and an Electron or be in stable state with the binding and ionization energies several times bigger than the same energies of the free Atom. By analogy with the Wigner-Seitz model of metallic bonding, the possibility of the existence of such effects on the lattice formed by the vacuum cavities filled with the two-Electron Atoms of the same type is discussed.