Classical study of p + He and p + He+ collisions in intense laser fields
Institute of Modern Physics, Fudan University, Shanghai 200433, China
2 CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China
Revised: 28 January 1999
Published online: 15 August 1999
In this paper, ion-atom and ion-ion collisions in the presence of intense laser fields are qualitatively studied by Classical Trajectory Monte Carlo (CTMC) simulations. It is found that in contrast to the field-free collisions, the colliding ion and the target nucleus could absorb energy from the applied laser fields when the electrons escape from the collision system. This result is explained in terms of Coulomb explosion induced by the enhanced ionization at the so-called critical internuclear distance. Also, the corresponding energy gain cross-sections are evaluated.
PACS: 33.80.Rv – Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) / 34.10.+x – General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.) / 34.50.Fa – Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999