报告题目：Electron loss from highly charged hydrogen-like ions in collisions with electrons, protons and light atoms
报告人： Prof. Dr. Alexander Voitkiv
Institute for theoretical Physics I
University of Dusseldorf
时间： 2017年8月30日 14:30
We study electron loss from a hydrogen-like highly charged ion by the impact of equivelocity electrons and protons and also in collisions with hydrogen and helium. The collision velocity v varies between vmin and vmax, where vmin and vmax correspond to the energy threshold εth for electron loss in collisions with a free electron and to ≈5εth, respectively.
Our results show that in this range of v : i) compared to equivelocity electrons protons are more effective in inducing electron loss (due to a substantially larger volume of the effectively available final-state electron momentum space), ii) the relative (compared to protons) effectiveness of electron projectiles grows with increase in the atomic number of a highly charged ion, iii) the entire volume of the final-state-electron momentum space, kinematically available in collisions with electrons, is much weaker populated in collisions with protons than with electrons. The latter, in particular, means that in collisions with very light atoms the contributions to the loss process from the interactions with the nucleus and the electron(s) of the atom are effectively separated in the final-state-electron momentum space.