Comparison of quasi-classical and quasi-static quantum approaches to the ionization of helium by a circularly polarized laser field

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Journal of the Optical Society of America, Part B: Optical Physics

DOI:https://doi.org/10.1364/JOSAB.13.000096· OSTI ID:278674

Lerner, P B ^[1]; LaGattuta, K; Cohen, J S ^[2]

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1. Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Employing the quasi-classical Fermi molecular dynamics (FMD) method, we find no evidence for the existence of a nonsequential double-ionization mechanism for helium interacting with a pulse of circularly polarized, high-intensity laser radiation. This contrasts with our earlier research, for linearly polarized laser light [Phys. Rev. A {bold 49,} R12 (1994)], in which effects of the nonsequential double ionization of helium were noted. We also compute emitted-electron kinetic energy spectra by FMD and compare these with spectra derived from a quasi-static tunneling model calculation. In this context we discuss the applicability of the FMD approach to simulations of the photoionization of multielectron systems by intense pulsed laser fields. {copyright} {ital 1996 Optical Society of America.}

• Sponsoring Organization: USDOE
• OSTI ID: 278674
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics, Journal Name: Journal of the Optical Society of America, Part B: Optical Physics Journal Issue: 1 Vol. 13; ISSN JOBPDE; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTRON SPECTRA
HAMILTONIAN FUNCTION
HELIUM
NEAR INFRARED RADIATION
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
POLARIZATION