### Abstract

To test the validity of classical trajectory and perturbative quantal methods for electron-impact ionization of H-like ions from excited states, we have performed advanced close-coupling calculations of ionization from excited states in H, Li 2+ and B 4+ using the R -matrix with pseudo states and the time-dependent close-coupling methods. Comparisons with our classical trajectory Monte Carlo (CTMC) and distorted-wave (DW) calculations show that the CTMC method is more accurate than the DW method for H, but does not improve with n and grows substantially worse with Z , while the DW method improves with Z and grows worse with n .

Original language | English |
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Pages (from-to) | L199 |

Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |

Volume | 38 |

Issue number | 12 |

DOIs | |

Publication status | Published - 2005 |

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## Cite this

Griffin, D. C., Ballance, C. P., Pindzola, M. S., Robicheaux, F., Loch, S. D., Ludlow, J. A., Witthoeft, M. C., Colgan, J., Fontes, C. J., & Schultz, D. R. (2005). The validity of classical trajectory and perturbative quantal methods for electron-impact ionization from excited states in H-like ions.

*Journal of Physics B: Atomic, Molecular and Optical Physics*,*38*(12), L199. https://doi.org/10.1088/0953-4075/38/12/L01