Multi-charged ion 10 Hydrogen 8 Atomic hydrogen 6 Eikonal 6 Highly charged ions 6 Impulse approximation 6 Ionization 6 Monte Carlo methods 6 Atoms 4 Charge transfer 4 Classical trajectory monte carlo 4 Cross section 4 Electron capture 4 High energy physics 4 Hydrogen targets 4 Impact ionization 4 Impact-parameter 4 Ion bombardment 4 Ionization of gases 4 Ions 4 Positive ions 4 Projectile charge 4 Protons 4 State selective 4 Angular distribution 2 Angular expansions 2 Article 2 Atomic physics 2 Binding energy 2 Born approximation 2