Complete Breakup of the Helium Atom by Proton and Antiproton Impact
- 17 November 2009
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 103 (21), 213201
- https://doi.org/10.1103/physrevlett.103.213201
Abstract
We present a fully ab initio, nonperturbative, time-dependent approach to describe single and double ionization of helium by proton and antiproton impact. The problem is discretized by a flexible finite-element discrete-variable representation on the radial grid. Good agreement with the most recent experimental data for absolute angle-integrated cross sections is obtained for projectile energies between 3 keV and 6 MeV. Also, angle-differential cross sections for two-electron ejection are predicted for a proton impact energy of 6 MeV. The time evaluation of the ionization process is portrayed by displaying the electron density as a function of the projectile location.This publication has 18 references indexed in Scilit:
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