Two-photon ionization of helium studied with the multiconfigurational time-dependent Hartree-Fock method
Journal Article
·
· Journal of Chemical Physics
- Institut fuer Theoretische Physik und Astrophysik, D-24098 Kiel (Germany)
The multiconfigurational time-dependent Hartree-Fock method (MCTDHF) is applied for simulations of the two-photon ionization of helium. We present results for the single and double ionizations from the ground state for photon energies in the nonsequential regime and compare them to direct solutions of the Schroedinger equation using the time-dependent (full) configuration interaction (TDCI) method. We find that the single ionization is accurately reproduced by MCTDHF, whereas the double ionization results correctly capture the main trends of TDCI.
- OSTI ID:
- 21560022
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 8 Vol. 134; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
ATOM COLLISIONS
ATOMS
BOSONS
CALCULATION METHODS
COLLISIONS
COMPARATIVE EVALUATIONS
CONFIGURATION INTERACTION
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EQUATIONS
EVALUATION
FLUIDS
GASES
GROUND STATES
HARTREE-FOCK METHOD
HELIUM
IONIZATION
MASSLESS PARTICLES
NONMETALS
PARTIAL DIFFERENTIAL EQUATIONS
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
PHOTONS
RARE GASES
SCHROEDINGER EQUATION
SIMULATION
TIME DEPENDENCE
WAVE EQUATIONS
74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
ATOM COLLISIONS
ATOMS
BOSONS
CALCULATION METHODS
COLLISIONS
COMPARATIVE EVALUATIONS
CONFIGURATION INTERACTION
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EQUATIONS
EVALUATION
FLUIDS
GASES
GROUND STATES
HARTREE-FOCK METHOD
HELIUM
IONIZATION
MASSLESS PARTICLES
NONMETALS
PARTIAL DIFFERENTIAL EQUATIONS
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
PHOTONS
RARE GASES
SCHROEDINGER EQUATION
SIMULATION
TIME DEPENDENCE
WAVE EQUATIONS