Ionization of helium by slow antiproton impact: Total and differential cross sections.

Borbély, Sándor and Feist, J. and Tőkési, Károly and Nagele, S. and Nagy, László and Burgdörfer, J. (2014) Ionization of helium by slow antiproton impact: Total and differential cross sections. PHYSICAL REVIEW A, 90 (5). pp. 1-8. ISSN 2469-9926

Preview

Text 1409.1379.pdf Available under License Creative Commons Attribution. Download (255kB) | Preview

Abstract

We theoretically investigate the single and double ionization of the He atom by antiproton impact for projectile energies ranging from 3 keV up to 1000 keV. We obtain accurate total cross sections by directly solving the fully correlated two-electron time-dependent Schr¨odinger equation and by performing classical trajectory Monte-Carlo calculations. The obtained quantum-mechanical results are in excellent agreement with the available experimental data. Along with the total cross sections, we also present the first fully ab initio doubly differential data for single ionization at 10 and 100 keV impact energies. In these differential cross sections we identify the binary-encounter peak along with the anticusp minimum. Furthermore, we also point out the importance of the postcollisional electron-projectile interaction at low antiproton energies which significantly suppresses electron emission in the forward direction.

Actions (login required)

Edit Item