On the second Born approximation for laser-assisted electron-atom collisions

Bouzidi, M.; Makhoute, A.; Khalil, D.; Maquet, Alfred; Joachain, Charles

doi:10.1088/0953-4075/34/5/303

Cited by 18 publications

(8 citation statements)

References 25 publications

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“…enhancement or diminution of the peak just seems to be reversed! It would be interesting to compare our experimental data with the results of more refined non-perturbative calculations taking target polarization or dressing of the initial state into account [24][25][26][27][28].…”

Section: Finally We Present Triply Differential Cross Sections Tdcsmentioning

confidence: 99%

Electron Impact Ionization in the Presence of a Laser Field: A Kinematically Complete(nγe,2e)Experiment

et al. 2005

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Single ionization of He by 1 keV electron impact in the presence of an intense (I=4×10 12 W/cm 2 ) laser field (λ=1064 nm) has been explored in a kinematically complete experiment using a "Reaction Microscope". Distinct differences in the singly to fully differential cross sections compared to the field-free situation are observed which cannot be explained by a first-order quantum calculation.Major features, such as the number of photons exchanged and the modification of the energy spectrum of emitted electrons can be qualitatively understood within a simple classical picture.

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Section: Finally We Present Triply Differential Cross Sections Tdcsmentioning

confidence: 99%

Electron Impact Ionization in the Presence of a Laser Field: A Kinematically Complete(nγe,2e)Experiment

et al. 2005

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“…The semi-perturbative treatment of laser-assisted (e, 2e) reactions, described above for the case of an atomic hydrogen target, has been extended by Joachain et al [29], Khalil et al [31], Makhoute et al [32,44,46], Bouzidi et al [81] and Ajana et al [43,45] to laser-assisted (e, 2e) reactions in helium, for which the possibilities of performing experiments are more favorable. These studies also showed that the choice of the laser parameters can strongly influence the dynamics of such processes, and that target-dressing effects can be important.…”

Section: The Semi-perturbative Methodsmentioning

confidence: 99%

Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry

Makhoute

Khalil

Ajana

2019

Atoms

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In this review, we present a comprehensive survey of laser-assisted (e, 2e) reactions. The influence of a laser field on the dynamics of (e, 2e) collisions in atomic hydrogen is analyzed in the symmetric and asymmetric coplanar geometries. Particular attention is devoted to the construction of the dressed (laser-modified) target wave functions, in both the initial and final states. The calculation is performed in the framework of Coulomb-Volkov-Born approximation, where the initial and final electrons are described by Volkov wave functions, while the interaction of the incident electron with the target atom is treated in the first and the second Born approximation. The state of the ejected electron is described by a Volkov/Coulomb-Volkov wave function. A detailed account is also given of the techniques we have used to evaluate the scattering amplitudes. The influence of the laser parameters (frequency, intensity, and direction of polarization) on the angular distribution of the ejected electron is discussed, and a number of illustrative examples are given. The structure of the triple differential cross section in the vicinity of resonances is also analyzed.

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“…We present here a short description of our theoretical approach to deal with the electron's impact excitation of the helium atom in the presence of a laser field. A detailed description can be found in our previous works [32][33][34]. The scenario we considered here can be simplified into the following form:…”

Section: Theoretical Descriptionmentioning

confidence: 99%

Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study

Ajana

Nehari

Khalil

et al. 2021

Atoms

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We report on a joined experimental and theoretical study of differential cross-sections resulting from inelastic scattering of a monoenergetic electron by helium atoms in the presence of an intense carbon dioxide laser. In particular, we measured the signals of the scattered electrons during the simultaneous electron–photon excitation of He 21P state for the first three microseconds of the laser pulse. The signals were measured for an incident electron energy of 45 eV and showed a structure that emerged at small scattering angles. The latter was found to be sensitive to the nature of the transferred photons, as well as the intensity of the laser field. The experimental findings were supported by quantum calculations based on the second-order Born approximation in which the correlated electron–electron interactions were taken into account.

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On the second Born approximation for laser-assisted electron-atom collisions

Cited by 18 publications

References 25 publications

Electron Impact Ionization in the Presence of a Laser Field: A Kinematically Complete(nγe,2e)Experiment

Electron Impact Ionization in the Presence of a Laser Field: A Kinematically Complete(nγe,2e)Experiment

Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry

Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study

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