Differential Cross Section Measurements for One-Electron Capture Process in Ar²+--Ne System at E_lab=40, 60 and 80, eV

Abstract

The angular distribution of Ar⁺ ions produced by one-electron capture process was measured from 0° to 20° with a newly constructed crossed-beam apparatus. Two components were observed in the angular distribution of Ar⁺, one component is a sharp peak around 0° and the other is a hump around the reduced scattering angle E_lab· θ _lab=290± 20, eV· deg. Only the following process is considered in the analysis of the experimental results: Ar²⁺(³P)+Ne(¹S₀)→ Ar⁺(²P)+Ne⁺(²P)+6.1, eV. The experimental results were compared with those obtained by pure classical trajectory calculations taking into account simple interaction potentials. The observed Ar⁺ ions in the forward peak were considered to be produced in a charge transfer process which occurs in the incoming channel of the trajectory, and the ions in the hump change charge in the outgoing channel.