Validity of time-dependent Hartree-Fock theory for the multiphoton ionization of atoms

Journal Article · Mon May 06 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2305· OSTI ID:5539879

Pindzola, M S ^[1]; Griffin, D C ^[2]; Bottcher, C ^[3]

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1. Department of Physics, Auburn University, Auburn, Alabama 36849 (USA)
2. Department of Physics, Rollins College, Winter Park, Florida 32789 (USA)
3. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 (USA)

The validity of time-dependent Hartree-Fock (TDHF) theory is explored for the multiphoton ionization of atoms. The 3D electrostatic interaction is replaced by a 1D soft-core interaction which allows the construction of an {ital N}-electron atom in only {ital N} dimensions. For multiphoton ionization of a two-electron He'' atom in its ground state, we solve the time-dependent Schroedinger equation directly on a 2D lattice and solve a 1D formulation of the TDHF equations. The 2D lattice solution compares favorably with the frozen-core TDHF results, but not with the full nonlinear TDHF results.

• OSTI ID: 5539879
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:18; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
ELEMENTS
FLUIDS
GASES
HARTREE-FOCK METHOD
HELIUM
IONIZATION
MULTI-PHOTON PROCESSES
NONMETALS
ONE-DIMENSIONAL CALCULATIONS
PHOTOIONIZATION
RARE GASES
TIME DEPENDENCE