Study of single electron capture in O6+ + He collisions

Abstract

Research on electron capture (EC) process are undoubtedly helpful for maturing theoretical models on ion-induced collision especially for low-energy region. In this work, a two-active-electron semiclassical asymptotic-state close-coupling method was used to calculate the total and l -solved state-selective single EC cross sections of O ^6+ + He collisions in the energy range of 0.3–100 keV u ^−1 , accompanied with experimental measurements in the energy range of 2.63–37.5 keV u ^−1 with an uncertainty of 11% in good agreement. Above 4.5 keV u ^−1 , the state-selective cross section of n = 5 was reported experimentally for the first time. Calculations with multiple theoretical methods were gathered and compared with present calculations. The importance of two-active-electrons correlation and large basis sets in theoretical calculations was found, and discrepancies between previous theoretical and experimental results can be explained by the present results.

Keywords

• electron capture
• ion-atom collisions
• electron correlation