Electron-impact ionization of atomic hydrogen in the presence of a laser field

Martin, Pa; Véniard, Valérie; Maquet, Alfred; Francken, Philippe; Joachain, Charles

doi:10.1103/physreva.39.6178

Cited by 65 publications

(43 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…This oscillatory phenomenon can be explained by the changes of the Bessel function, i.e., the sign of the argument of the Bessel function changes depending on the sign of the summation over N coming from equation (19). This behavior can be traced back to the fact that the argument of the Bessel functions, entering the expressions of the amplitudes equations (19) and (20), grows with 0  and varies with the scattering angle. Accordingly, at higher field strengths, every other laser parameter being fixed, one explores more zeros of the Bessel functions when varying the scattering angle.…”

Section: =´-)mentioning

confidence: 99%

“…to enhance or suppress the ionization cross section as per the requirement in a particular physical process. Since the laser field can act as a reservoir of energy and its polarization vector introduces a new axis of symmetry, the laser-assisted ionization cross sections could differ strongly in shape and magnitude from the field-free cross sections as predicted in several theoretical studies on this topic [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted coplanar symmetric (e, 2e) triple differential cross sections

Khalil¹,

Tlidi

Makhoute

et al. 2017

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

View full text Add to dashboard Cite

The second Born approximation in laserassisted (e, 2e) collisions in hydrogen I Ajana, A Makhoute, D Khalil et al. AbstractThe modification due to an external linearly polarized monochromatic laser field on the dynamics of the ionization process of an atomic hydrogen by electron-impact is studied theoretically for a coplanar symmetric geometry. The interaction of the laser field with the unbound electrons is treated in a non-perturbative way. The wave functions of the ingoing and outgoing electrons in the laser field are treated as non-relativistic Volkov waves, while the interaction of the bound electron with the laser field is treated by using first-order perturbation theory, assuming that the electric field strength associated with the external laser field is much less than the atomic unit e a 5 10 V cm 2 9 1 =´-. The influence of the laser parameters on the angular distribution is analyzed and several illustrative examples are discussed. Significant changes are noted both in the shape and magnitude of the triple differential cross sections (TDCS) by the application of the laser field. Numerical results show that the TDCS are strongly dependent on the dressing of the projectile by the laser field at low frequency in (e, 2e) spectroscopy region.

show abstract

“…This particular scattering geometry is called the co-planar asymmetric geometry. In [10][11][12][13] the states of the projectile electron are then described by Volkov wavefunctions [14] whereas for the slow ejected electron the combined influence of the laser field and the Coulomb field of the residual ion is taken into account [10]. The influence of the laser on the target states is treated using a first-order perturbation approach.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted (e, 2e) reaction in one-electron atoms and ions

Berakdar

Zhang

et al. 2005

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

View full text Add to dashboard Cite

We study the ionization of a hydrogenic target by the impact of moderate energy electrons and in the presence of a laser field. This process, generally referred to as the laser-assisted (e, 2e), is treated non-relativistically as follows: we evaluate the S-matrix elements using Volkov and Coulomb-Volkov wavefunctions for describing respectively the continuum states of the scattered and the ejected electrons. The dressed state of the target is described by a time-dependent wavefunction derived from a perturbation treatment (of the laser field). With the aid of numerical results we explore the dependences of the fully differential cross sections on the laser field properties such as the strength, the frequency and the polarization direction, as well as on the continuum electron energies and their emission angles. Furthermore, we assess the interplay between the laser influence and the role of scattering from the residual ion by comparing the cross sections from (one-electron) ionic targets and varying the charge state of the residual ion.

show abstract

Electron-impact ionization of atomic hydrogen in the presence of a laser field

Cited by 65 publications

References 29 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 coplanar symmetric (e, 2e) triple differential cross sections

Laser-assisted (e, 2e) reaction in one-electron atoms and ions

Contact Info

Product

Resources

About