Regular Article

Electron capture, excitation and ionization processes in He²⁺–H collisions in dense quantum plasmas

¹ Department of Physics, Sts Cyril and Methodius University, PO Box 162, 1000 Skopje, Macedonia
² Macedonian Academy of Sciences and Arts, PO Box 428, 1000 Skopje, Macedonia

^a e-mail: dragan.jakimovski@gmail.com

Received: 7 July 2018
Received in final form: 4 October 2018
Published online: 21 December 2018

Abstract

Electron capture, excitation and ionization processes in He²⁺–H collisions taking place in quantum plasmas are studied by employing the two-center atomic orbital close coupling (TC-AOCC) method. The Debye-Hückel-cosine (DHC) potential is used to describe the plasma screening effects on the Coulomb interaction between charged particles. The properties of eigenenergies of hydrogen-like atom with DHC potential are investigated as function of the screening length of the potential. It is found that the binding energies of nl states decrease with decreasing the screening length of the potential. The dynamics of excitation, electron capture and ionization processes in He²⁺–H collision system is investigated when the screening length of the potential varies for a wide collision energy range. The TC-AOCC cross sections are compared with those for the pure Coulomb potential and, for the total electron capture, with the results of classical trajectory Monte Carlo method.