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

Abstract

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 andmore » detailed level.« less

Authors:
;  [1];  [1]
  1. J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2604 (United States)
Publication Date:
OSTI Identifier:
21528917
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 82; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevA.82.063417; (c) 2010 American Institute of Physics; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Zhangjin, Chen, Lin, C D, Yaqiu, Liang, and College of Physics, Liaoning University, Shenyang 110036. Quantitative rescattering theory of correlated two-electron momentum spectra for strong-field nonsequential double ionization of helium. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.82.063417.
Zhangjin, Chen, Lin, C D, Yaqiu, Liang, & College of Physics, Liaoning University, Shenyang 110036. Quantitative rescattering theory of correlated two-electron momentum spectra for strong-field nonsequential double ionization of helium. United States. https://doi.org/10.1103/PHYSREVA.82.063417
Zhangjin, Chen, Lin, C D, Yaqiu, Liang, and College of Physics, Liaoning University, Shenyang 110036. Wed . "Quantitative rescattering theory of correlated two-electron momentum spectra for strong-field nonsequential double ionization of helium". United States. https://doi.org/10.1103/PHYSREVA.82.063417.
@article{osti_21528917,
title = {Quantitative rescattering theory of correlated two-electron momentum spectra for strong-field nonsequential double ionization of helium},
author = {Zhangjin, Chen and Lin, C D and Yaqiu, Liang and College of Physics, Liaoning University, Shenyang 110036},
abstractNote = {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.},
doi = {10.1103/PHYSREVA.82.063417},
url = {https://www.osti.gov/biblio/21528917}, journal = {Physical Review. A},
issn = {1050-2947},
number = 6,
volume = 82,
place = {United States},
year = {2010},
month = {12}
}