Study of electron capture cross sections in Ne⁸⁺ ions collision with H₂ and He

In this work, we present absolute total and n-resolved state-selective cross sections of single electron capture (SEC) between Ne⁸⁺ ions and neutral H₂, as well as He targets. Our experimental cross sections are compared with our present classical trajectory Monte Carlo (CTMC) simulations.

The experiments were performed on the 150 kV highly charged ion collision platform at Fudan University to measure the total and state-selective EC cross sections [1,2]. The state-selective EC cross sections measurements were performed using a cold target recoil ion momentum spectroscopy (COLTRIMS) apparatus [3]. The cross sections have been measured in the energy range of 2.8 to 40 keV/u, including a range of velocities corresponding to fast SW and coronal mass ejections (CMEs).

The CTMC simulations were made in three-body approximations using two versions of the model [4]. In the first case, Coulomb force is acting between the colliding particles. In this case we calculate the effective charge of the valance electron by Slater’s rules [5]. In the second approach, for the description of the interaction between the active target electron end the target core, a central model potential [6] is used. We present details comparison and analyzes the similarities and differences between our experimental and theoretical data.