Electron-impact ionization cross sections for the 1s2s1S and 1s2s3S metastable states of Li+ are calculated using both perturbative distorted-wave and non-perturbative R-matrix with pseudo-states and time-dependent close-coupling methods. Term-resolved distorted-wave calculations are found to be approximately 15% above term-resolved R-matrix with pseudostates calculations. On the other hand, configuration-average time-dependent close-coupling calculations are found to be in excellent agreement with the configuration-average R-matrix with pseudostates calculations. The non-perturbative R-matrix and close-coupling calculations provide a benchmark for experimental studies of electron-impact ionization of metastable states along the He isoelectronic sequence. © 2007 IOP Publishing Ltd.
CITATION STYLE
Berengut, J. C., Loch, S. D., Ballance, C. P., & Pindzola, M. S. (2007). Electron-impact ionization of the metastable excited states of Li +. Journal of Physics B: Atomic, Molecular and Optical Physics, 40(7), 1331–1336. https://doi.org/10.1088/0953-4075/40/7/002
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