Abstract

A five-body classical trajectory Monte Carlo model has been developed to study double electron removal from H2 by collisions with highly charged ions at impact energies ranging from 1 eV/u to 1 GeV/u. The longitudinal and transverse final-state correlation between ejected electrons is calculated for double ionization of H2 by impact of Se28+ at 3.6 MeV/u and U92+ at 1 GeV/u; the electron-electron interaction is dynamically included during the collision when one of the electron’s total energy becomes positive. Relativistic corrections are incorporated to reflect the Lorentz contraction of the projectile’s electric field. The cross-section dependence on the alignment of the H2 molecular axis was investigated. Here, transfer ionization of H2 by O8+ at 500 keV/u is found to have a maximum for the molecular axis aligned perpendicular to the projectile velocity, while no orientation dependence is found for double ionization at 500 keV/u. In contrast, a minimum in the cross section at 90° is found for 1-GeV/u U92+ H2 collisions. A systematic study of the energy partitioning between the two product H1 ions has been made for Xe54+ H2 from 1 eV/u to 1 MeV/u. Large deviations from Franck-Condon behavior are found for impact energies E&10 keV/u. At low energies the proton energies are very energetic with the main contribution arising from collisional transfer from the projectile, while the proton energy spectrum at high impact energy is due to the Coulomb explosion of the isolated molecule. @S1050-2947~99!07502-2#

Department(s)

Physics

International Standard Serial Number (ISSN)

1094-1622; 1050-2947

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Physical Society, All rights reserved.

Publication Date

01 Jan 1999

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