We have performed a kinematically complete experiment for target ionization with simultaneous projectile detachment (TIPD) in 200-keV H− + He collisions. From the data we extracted triple-differential cross sections (TDCSs) for each electron separately. These TDCSs closely resemble corresponding data for single ionization by charged-particle impact. Surprisingly, the contributions from higher-order processes to TIPD, proceeding through two independent interactions of each electron with the core of the respective other collision partner, are found to be somewhat larger than the first-order process proceeding through the electron-electron interaction.
T. Ferger et al., "Triple-Differential Cross Sections for Target Ionization with Simultaneous Projectile Detachment in 200-keV H⁻ + He Collisions," Physical Review A: Atomic, Molecular, and Optical Physics, vol. 76, no. 4, pp. 042708-1-042708-6, American Physical Society (APS), Oct 2007.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.76.042708
German Research Association
National Science Foundation (U.S.)
Keywords and Phrases
Electrons; Helium; Ionization; Projectiles; Electron-electron interaction; Projectile detachment; Triple-differential cross section (TDCS); High energy physics
Library of Congress Subject Headings
Collisions (Nuclear physics)
Differential cross sections
International Standard Serial Number (ISSN)
Article - Journal
© 2007 American Physical Society (APS), All rights reserved.