Electron capture to the continuum manifestation in fully differential cross sections for ion impact single ionization. (4th April 2018)

• Record Type: Journal Article
• Authors: Ciappina, M F; Fojón, O A; Rivarola, R D
• Is Part Of: Journal of physics. Volume 51:Number 8(2018:Apr. 15)
• Publication Date: 2018-04-04
• Subjects: ion collisions -- two-center effects -- distorted wave theories; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aab5dc
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We present theoretical calculations of single ionization of He atoms by protons and multiply charged ions. The kinematical conditions are deliberately chosen in such a way that the ejected electron velocity matches the projectile impact velocity. The computed fully differential cross sections (FDCS) in the scattering plane using the continuum-distorted wave-eikonal initial state show a distinct peaked structure for a polar electron emission angle θ k = 0°. This element is absent when a first order theory is employed. Consequently, we can argue that this peak is a clear manifestation of a three-body effect, not observed before in FDCS. We discuss a possible interpretation of this new feature.