Ionization of hydrogen atom induced by relativistic particles collisions accompanied by low momentum transfer

Ionization of a hydrogen atom in soft collisions with a relativistic charged particle is considered for the cases (a) and (b) . Here, Z and vare, respectively, the charge and velocity of the incident particle, v 0 is the typical electron velocity in the ground state of the hydrogen atom, and c is the velocity of light. Analytical expressions for the differential cross sections for the ionization of hydrogen atom are analyzed. The asymmetry in the angular distribution of the emitted electrons is shown to result from the following two effects: the atomic absorption of virtual quanta of the field related to relativistic particle and the final-state interaction.

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