Measurement of the free-free cross section of e<sup>-</sup>-Ar scattering

Andrick, D; Langhans, L.

doi:10.1088/0022-3700/11/13/019

Cited by 37 publications

(17 citation statements)

References 9 publications

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“…Since in a FF transition the target does not change state, its own energy spectrum can be neglected for a less intense as well as a lowfrequency field. The measurements on the LA FF transitions [2][3][4][5][6][7][8] for single [2] or multiphoton exchanges [3][4][5][6][7][8] are so far limited to the experimentally preferred inert gas atomic targets only. For theoretical calculations, on the other hand, atomic hydrogen is the simplest and ideal target to have a better insight into the process.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted free-free transition in electron-atom collisions

Sinha

Bhatia

2011

Phys. Rev. A

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The free-free transition is studied for an electron-hydrogen atom system in the ground state at very low incident energies in the presence of an external homogeneous, monochromatic, and linearly polarized laser field. The incident electron is considered to be dressed by the laser field in a nonperturbative manner by choosing the Volkov solutions in both the initial and final channels. The space part of the scattering wave function for the electron is solved numerically by taking into account the effect of electron-exchange interactions, short-range interactions, as well as of long-range interactions. The laser-assisted differential as well as total elastic cross sections are calculated for single-photon absorption or emission in the soft photon limit, the laser intensity being much less than the atomic field intensity. A strong suppression is noted in the laser-assisted cross sections as compared to the field-free situations. A significant difference is noted in the singlet and the triplet cross sections.

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Section: Introductionmentioning

confidence: 99%

Laser-assisted free-free transition in electron-atom collisions

Sinha

Bhatia

2011

Phys. Rev. A

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“…A modulation of the electron beam was measured with an upshift or downshift of the electron energy by the energy of the laser photons. This was completely reproduced by detailed measurements when using argon molecules as medium in the crossing area (Andrick et al, 1978) and repeated in order to measure further details (Weingartshofer et al, 1985). From the beginning, this was related to a quantum condition formulated in 1969 (Schwarz et al, 1969) resulting in a correspondence principle for optical interaction with media.…”

Section: Confirming Of the Quantum Property Of The Schwarz-hora Effectmentioning

confidence: 85%

“…Energy from a laser field to free electrons can be transferred by nonlinear mechanisms as it is now well known from electron acceleration in laser fields in vacuum. The fact that energy from laser photons is exchanged with the electrons within a medium (Schwarz et al, 1969;Andrick et al, 1978;Weingartshofer et al, 1985) can only happen by inclusion of nonlinear processes. The electrons in the medium are not free, and assuming that these behave in a similar way as free electrons can be considered only as a hypothetical virtual process.…”

Section: Confirming Of the Quantum Property Of The Schwarz-hora Effectmentioning

confidence: 99%

Peierls’ dielectric response for clarification of interacting electron with laser beams

Hora

2013

Laser Part. Beams

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The formulation of the momentum of electromagnetic radiation or photons in media is a historical question. After Peierls discussed all these options, a crucial new value for the dominating dispersion factor σ was derived for non-ionized media with the consequence that an opto-acoustic coupling exists. After the experimental confirmation of the Kapitza-Dirac effect the generalization of the effect for quantum modulation of electron beams by crossing laser beams is ascertained. The evaluation of repeated experiments of this quantum modulation is very precisely confirming by measurements that the Peierls factor σ = 1/5 is correct.

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“…2 may be presented in the form A2(p,p') = (en)2.fi(p,p', 8) + (en')2f2(pji, 9) + (en)(en')f12(p,p', 9),…”

Section: Resultsmentioning

confidence: 99%