Quantitative rescattering theory of correlated two-electron momentum spectra for strong-field nonsequential double ionization of helium

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.063417· OSTI ID:21528917

Zhangjin, Chen; Lin, C D ^[1]; Yaqiu, Liang ^[1]

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1. J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

We study the correlated two-electron momentum spectra of the nonsequential double ionization (NSDI) of an atom in an intense laser field based on the recently developed quantitative rescattering (QRS) theory. According to the rescattering model, an electron that was released earlier in the laser pulse may return to collide again with the target ion. NSDI can occur directly if this electron knocks out another electron in a process similar to the (e,2e) process or indirectly by first exciting the target ion to an excited state which is later ionized by the laser field. Using QRS, we obtain the returning electron wave packet. By multiplying this wave packet with standard field-free (e,2e) differential cross sections, or with inelastic electron-impact excitation cross sections and the subsequent tunneling ionization, we obtain the correlated two-electron momentum spectra. The calculated spectra agree mostly with the experimental data. However, experimental data show additional features that cannot be accounted for by these two mechanisms only, and other mechanisms for NSDI are suggested. The contributions of these mechanisms to the longitudinal ion momentum distributions are also analyzed. The present quantum mechanical QRS calculation verifies the validity of rescattering model for the NSDI processes at the most fundamental and detailed level.

• OSTI ID: 21528917
• Journal Information: Physical Review. A, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevA.82.063417; (c) 2010 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
DIFFERENTIAL CROSS SECTIONS
ELECTRON SPECTRA
ELECTRONS
EXCITATION
EXPERIMENTAL DATA
HELIUM
IONIZATION
IONS
LASER RADIATION
PULSES
QUANTUM MECHANICS
RESCATTERING
TUNNEL EFFECT
WAVE PACKETS
CHARGED PARTICLES
CROSS SECTIONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FERMIONS
FLUIDS
GASES
INFORMATION
LEPTONS
MECHANICS
NONMETALS
NUMERICAL DATA
RADIATIONS
RARE GASES
SCATTERING
SPECTRA