Calibration of distorted wave Born approximation for electron impact excitation of Ne and Ar at incident energies below 100 eV

Details Calibration of distorted wave Born approximation for electron impact excitation of Ne and Ar at incident energies below 100 eV Calibration of distorted wave Born approximation for electron impact excitation of Ne and Ar at incident energies below 100 eV

2011-01-22

arxiv.org/abs/1101.4326v1

Physics

Atomic Physics

10 pages, 8 figures

Scientific paper

We calibrate the distorted wave Born approximation (DWBA) for electron impact excitation processes empirically. Differential cross sections (DCS) for the excitation of the $2p^53s$, $2p^53p$,$2p^54s$, and $2p^54p$ configurations of Ne and the $3p^54s$ and $3p^54p$ configurations of Ar by electron impact are calculated using DWBA for incident energies between 20 and 100 eV. The calculated results are compared with the absolute experimental measurements and other theoretical results. We found that the structure of the DCS can be well reproduced by the DWBA model while the magnitude is overestimated for most cases considered here. The differences in magnitude between DWBA and experiment are used to test the calibration of DWBA such that the DWBA can be used to describe laser-induced electron impact excitation processes. These processes are involved in the non-sequential double ionization of atoms in strong laser fields.

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