Strong-field laser ionization of alkali atoms using two-dimensional cylindrical and three-dimensional Cartesian time-dependent Hartree--Fock theory
- Department of Physics, Auburn University, Auburn, Alabama 36849 (USA)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 (USA)
The time-dependent Schroedinger equation is solved directly for an alkali atom subject to an arbitrarily strong electromagnetic field. Two methods are compared. A tridiagonal finite-difference method is used to solve Schroedinger's equation on a two-dimensional (2D) cylindrical coordinate lattice, while a finite-element method using odd-order {ital B} splines is used to solve Schroedinger's equation on a three-dimensional (3D) Cartesian coordinate lattice. Multiphoton ionization cross sections are extracted from 2D cylindrical calculations for hydrogen and lithium and then compared with previous perturbation theory results. Single-photon ionization probabilities are compared from 2D cylindrical and 3D Cartesian calculations for hydrogen.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6916939
- Journal Information:
- Journal of the Optical Society of America, Part B: Optical Physics; (USA), Vol. 7:4; ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKALI METALS
MULTI-PHOTON PROCESSES
HYDROGEN
QUANTUM ELECTRONICS
ATOMS
ELECTRIC FIELDS
HARTREE-FOCK METHOD
LASER RADIATION
PHOTOIONIZATION
TIME DEPENDENCE
ELECTROMAGNETIC RADIATION
ELEMENTS
IONIZATION
METALS
NONMETALS
RADIATIONS
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory