Ionization of one-electron atoms and ions upon charged-particle impact assisted by a laser field

Li, S.-M.; Berakdar, J.; Zhang, S.-T.; Chen, Jiangxi

doi:10.1016/j.elspec.2007.02.002

Cited by 12 publications

(4 citation statements)

References 31 publications

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“…The unbounded electrons were described either as Volkov or Coulomb-Volkov states [18][19][20][21][22][23][24] Later, Joachain and his colleagues investigated the cases on atomic hydrogen and helium [25,26], considering the dressing effects on the initial and final (unbound) state, in the presence of laser field, and found that the differential cross section significantly varies. In the literature, many authors have reported various theoretical studies on laser-assisted electron-impact ionization of atomic hydrogen and single-and double-ionization of helium [27][28][29][30][31][32][33][34][35]. Such investigations have also been expanded to include the bi-chromatic laser field [36,37].…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted (e,2e) study with twisted electron beam on H-atom

Neha,

Dhankhar,

Pinto

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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We study the laser-assisted twisted electron beam impact ionization of the hydrogen atom incoplanar asymmetric geometry. We develop the theoretical model in the first Born approximation.In the presence of the laser field, we treat the incident and scattered electrons as Volkov waves; the ejected electron, moving in the combined field of the laser and residual ion H+, as a Coulomb- Volkov wave function. In this communication, we compare the angular profile of triple differential cross-section (TDCS) for laser-assisted twisted electron beam incidence with the plane-wave, laser-assisted plane wave, and field-free twisted electron beam for (e,2e) processes for different orbital angular momentum (OAM) number (m_l) values. We analyze the effect of impact-parameter b of twisted electron beam and the laser parameters on the angular distribution of the TDCS. We study the (TDCS)_av for the macroscopic target to examine the effect of opening angle θ_p of the twisted electron beam on the angular profile of TDCS. We also observe the influence of coherent superposition of two Bessel states on the angular profile of TDCS. Our results clearly show the effects of laser parameters (electric field ε and number of photon exchanged (l)) and twisted electron beam parameters (OAM number (m_l) and opening angle (θ_p)) on the angular distribution of TDCS.

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Section: Introductionmentioning

confidence: 99%

Laser-assisted (e,2e) study with twisted electron beam on H-atom

Neha,

Dhankhar,

Pinto

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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“…A number of theoretical works on laser-assisted (e, 2e) collisions in atomic systems have been published so far, and several approaches have been put forward. Most studies deal with the case of kinematics that involves small energy and momentum transfer [49,50] . Theoretical analyzes of laser-assisted electron-impact ionization at high impact energy and large momentum transfer have been delivered recently [51,52].…”

Section: Introductionmentioning

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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“…In the past few years, there has been particular interest for the study of (e, 2e) processes in the low-incident-energy regime in coplanar symmetric geometry [17][18][19][20]. A number of theoretical calculations [21][22][23][24][25][26][27][28][29] exist in the literature for the laser-assisted (e, 2e) process of hydrogen and helium atoms, prior to the first realization of the kinematically complete experiment of Hohr et al [30] for the laser-assisted single ionization of a helium atom.…”

Section: Introductionmentioning

confidence: 99%

Exchange effects and second-order Born corrections in laser-assisted(e,2e)collisions with helium atoms

et al. 2015

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The triple differential cross section for laser-assisted ionization of a helium target by slow electrons is analyzed within the framework of the second Born approximation. We evaluate the S-matrix elements using Volkov and Coulomb-Volkov wave functions for describing the continuum states of the scattered and the ejected electrons, respectively. The required scattering amplitudes are performed by expanding the atomic wave functions onto a complex-scaled Sturmian basis, which allows us to exactly take into account the contribution of the continuous spectrum to the dressing of the atomic states. Our results have been improved by taking into account exchange effects. Furthermore, the second-order Born correction is seen to be important and significantly affects the magnitudes of the binary and recoil peaks.

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Ionization of one-electron atoms and ions upon charged-particle impact assisted by a laser field

Cited by 12 publications

References 31 publications

Laser-assisted (e,2e) study with twisted electron beam on H-atom

Laser-assisted (e,2e) study with twisted electron beam on H-atom

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

Exchange effects and second-order Born corrections in laser-assisted(e,2e)collisions with helium atoms

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