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

Journal Article · Wed Jun 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063417· OSTI ID:21550140

Sinha, C ^[1]; Bhatia, A K ^[2]

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1. Theoretical Physics Department, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, West Bengal (India)
2. Solar Physics Laboratory, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)

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.

• OSTI ID: 21550140
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ACCIDENTS
ATOM COLLISIONS
BOSONS
COLLISIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON EXCHANGE
ELECTRON TRANSFER
ELECTRON-ATOM COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
FUNCTIONS
HYDROGEN
INTERACTIONS
LASER RADIATION
LASERS
MASSLESS PARTICLES
MATHEMATICAL SOLUTIONS
MONOCHROMATIC RADIATION
NONMETALS
PHOTON EMISSION
PHOTONS
RADIATIONS
SCATTERING
SORPTION
WAVE FUNCTIONS