Abstract
All momentum components of the three outgoing particles are calculated for 100 keV p and p- + He single-ionization collisions. Differential ejected electron cross sections are evaluated for a fixed collision plane defined by the incident momentum vector of the projectile and the final momentum vector of the He+ recoil ion. For proton impact the electron spectra display saddle-point ionization when the transverse recoil ion momentum is small, whereas the electrons are ejected in the backward direction for large transverse recoil ion momenta. The antiproton collisions primarily show backward ejected electrons. However, for the antiproton system there is a decided preference for the electrons to be ejected in a direction opposite to that of the He+ recoil ion, yielding an asymmetric ionized electron spectra. Binary electrons are discernible for intermediate to large recoil momenta. For both systems the momentum spectra of the products clearly indicate the importance of all three bodies in determining the dynamics of these ionization collisions.
Recommended Citation
C. J. Wood and R. E. Olson, "Three-Body Collision Dynamics for Single Ionization of Helium by Protons and Antiprotons," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 29, no. 7, IOP Publishing, Apr 1996.
The definitive version is available at https://doi.org/10.1088/0953-4075/29/7/003
Department(s)
Physics
International Standard Serial Number (ISSN)
0953-4075
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 IOP Publishing, All rights reserved.
Publication Date
14 Apr 1996
