Strong-field laser ionization of alkali atoms using two-dimensional cylindrical and three-dimensional Cartesian time-dependent Hartree--Fock theory

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Journal of the Optical Society of America, Part B: Optical Physics; (USA)

DOI:https://doi.org/10.1364/JOSAB.7.000659· OSTI ID:6916939

Pindzola, M S ^[1]; Bottrell, G J; Bottcher, C ^[2]

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1. Department of Physics, Auburn University, Auburn, Alabama 36849 (USA)
2. 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), Journal Name: Journal of the Optical Society of America, Part B: Optical Physics; (USA) Vol. 7:4; ISSN JOBPD; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOMS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
HARTREE-FOCK METHOD
HYDROGEN
IONIZATION
LASER RADIATION
METALS
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOIONIZATION
QUANTUM ELECTRONICS
RADIATIONS
TIME DEPENDENCE