Modified Coulomb scattering in intense, high-frequency laser fields

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.4536· OSTI ID:5161313

van de Ree, J; Kaminski, J Z; Gavrila, M

We present the first accurate calculation within a recently developed nonperturbative theory for free-free transitions in intense, high-frequency laser fields, done for modified elastic scattering from a Coulomb potential. The field is assumed to be monochromatic and linearly polarized. In the high-frequency limit of the theory, the scattering takes place from a time-independent, ''dressed'' Coulomb potential, which contains the frequency and intensity of the field only through a parameter ..cap alpha../sub 0/. The corresponding Schroedinger equation in integral form was solved by the close-coupling method. The cross section depends on the scattering angle theta and on two other angles defining the orientation of the initial and final momenta k/sub i/ and k/sub f/ with respect to the electric field. Large deviations from the Rutherford cross section are found in the nonperturbative regime. At small angles theta the deviations appear in the form of characteristic Coulomb interference oscillations, while in backward scattering this pattern is distorted in a way markedly dependent on the orientation of the momenta with respect to the electric field. An unexpected rotation invariance of the cross section around k/sub i/ was found for certain ''magic'' scattering angles theta.

• Research Organization: Physics Department, Eindhoven University of Technology, Eindhoven, The Netherlands
• OSTI ID: 5161313
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 37:11; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BASIC INTERACTIONS
COLLISIONS
COULOMB SCATTERING
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
EQUATIONS
INTERACTIONS
LASER RADIATION
PARTIAL DIFFERENTIAL EQUATIONS
POTENTIAL SCATTERING
RADIATIONS
SCATTERING
SCATTERING AMPLITUDES
SCHROEDINGER EQUATION
SPHERICAL HARMONICS
WAVE EQUATIONS