Abstract
The dependence of electron capture and ionization processes on the pre-collision electronic distribution is examined for the systems H+ + Na(3s, 3pΣ, 3pΠ) primarily in the energy range 1-15 keV. Populations of the capture and ionization channels as well as the coherence of the post-collision electronic distribution of the capture product are formulated using the classical trajectory Monte Carlo (CTMC) method. Total capture and ionization cross sections arising from initially aligned Na(3p) targets exhibit transient behaviour near the velocity-matching energy of 5.7 keV. This observation is described in terms of anisotropy parameters; anisotropy effects are also analysed for the capture states n = 2, 3 and 4. In addition to the population manifold, we present theoretical calculations of the alignment parameter A20 and the z-component of the dipole moment (Dz), in order to relate the alignment of the post-collision charge cloud to that of the initial Na(3s, 3pΣ, 3pΠ) target states. The z-component of the cross product of the angular momentum and the Runge-Lenz vector ((L x A)z) is used to describe the orientation of the post-collision product generated from the aligned Na(3pΣ, 3pΠ) pre-collision reactants.
Recommended Citation
C. J. Lundy and R. E. Olson, "A Classical Analysis of Proton Collisions with Ground-State and Excited, Aligned Sodium Targets," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 29, no. 9, pp. 1723 - 1736, IOP Publishing, May 1996.
The definitive version is available at https://doi.org/10.1088/0953-4075/29/9/018
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 May 1996
