Charge transfer processes in proton-helium collisions: The validity of the first Born approximation. (March 2015)

• Record Type: Journal Article
• Authors: Popov, Yu V; Galstyan, A; Chuluunbaatar, O; Houamer, S; Bulychev, A A; Schöffler, M S; Kim, H-K; Titze, J N; Jahnke, T; Schmidt, L Ph H; Schmidt-Böcking, H; Dörner, R
• Is Part Of: Journal of physics. Number 601(2015)
• Publication Date: 2015-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/601/1/012008
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The validity of the Born series expansion for the charge transfer reactions is studied in the case of a proton-helium collision. Three different channels are considered, namely the charge transfer, transfer excitation and transfer ionization. The differential cross sections and the contributions from different charge transfer mechanisms within various Born approximations are compared with experimental data. The role of the electron-electron correlations in the initial helium state is discussed in detail. It is shown that the first Born approximation is valid in the case of reactions under consideration, provided very small scattering angles are involved and the proton energy is >500 keV. It is also shown that the electron-electron correlations in the initial helium state are important only in transfer excitation and transfer ionization reactions.