State-selective Electron Capture for keV He2＋ Ions on Helium Collisions Studied by RIMS

摘要

We constructed a COLTRIMS on the ECR source atomic beam line at the Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou. By using the recoil ion momentum imaging technique, we investigated the single electron capture process of 7. 5 keV/u He2+ on helium collisions. From momentum and energy conservation laws, one can obtain longitudinal momentum of the recoil ion P//R as