关键词: 电荷转移截面, 原子轨道强耦合方法, 电荷转移发射光谱

Abstract: Charge transfer in He⁺-H^- collisions is investigated using two-center atomic orbital close-coupling(TC-AOCC) method.All bound states of He⁺ (nl) with n≤7,as well as 1s bound states and ns(n=2~6) quasi-continuum states of H^- are included in the AOCC basis.Energies of bound states calculated are in good agreement with NIST data and theoretical results.The total and state-selective cross sections are calculated within a range of energy from 4 to 400 keV.For low-energy collisions,dominant capturing channels are those with quantum numbers n=3-5.With increasing incident energies,transfer of charge to n=2 becomes the dominant reaction.Moreover,for low-energy collisions,cross sections for electrons capture to higher-l states are bigger than that to lower l states.For high-energy collisions,dominant channel is to l=1 states.Charge exchange spectrum due to electron captured to excited states is calculated.Importance of cascade effects is found.

Key words: charge transfer cross section, atomic orbital close-coupling method, charge exchange spectra