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Ionization of hydrogen by ion impact in the presence of a laser field resonant to bound–bound atomic transitions

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Voitkiv,  A. B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich,  J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Citation

Voitkiv, A. B., Toshima, N., & Ullrich, J. (2006). Ionization of hydrogen by ion impact in the presence of a laser field resonant to bound–bound atomic transitions. Journal of Physics B: Atomic, Molecular and Optical Physics, 39(18), 3791-3803. doi:doi:10.1088/0953-4075/39/18/009.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-7F46-7
Abstract
We study the impact ionization of atomic hydrogen in collisions with fast ions assisted by the pulse of a weak laser field with a sub-nanosecond duration (T ~ 10-10 s). The field is linearly polarized and its frequency is resonant to the 1s–2p hydrogen transitions. We consider the field-assisted impact ionization by using a simple model in which the interaction between the atom and the resonant field is described in the rotating-wave approximation and the interaction of the field-dressed atom with the ion is treated using the continuum-distorted-wave-eikonal-initial-state approach. Our consideration for 1 MeV u-1 C6+–hydrogen collisions shows that the presence of the laser field can have a profound effect on all aspects of the impact ionization, including the angular and energy distributions of the emitted electrons, the total ionization cross section and the projectile scattering.