Electron-impact ionization of ground and metastable neon

Ballance, C. P.; Ludlow, J. A.; Pindzola, M. S.; Loch, S. D.

doi:10.1088/0953-4075/42/17/175202

Title: Electron-impact ionization of ground and metastable neon

Journal Article · Wed Aug 12 00:00:00 EDT 2009 · Journal of Physics. B, Atomic, Molecular and Optical Physics

DOI:https://doi.org/10.1088/0953-4075/42/17/175202· OSTI ID:1564659

Ballance, C. P.; Ludlow, J. A.; Pindzola, M. S.; Loch, S. D.

Electron-impact ionization of neutral neon continues to be of interest both from a fundamental and an applied perspective. Non-perturbative calculations are required for the electron-impact ionization of ground and excited states of neon. R-matrix with pseudostates (RMPS) calculations for the electron-impact ionization of the 1s22s22p6 ground state of Ne at higher incident electron energies are now made possible by the further partitioning of each individual LS partial wave across a greater number of processors. Furthermore, instead of a long sequence of parallel matrix diagonalizations, every partial wave diagonalization is now carried out concurrently. The ground-state cross section is found to be in excellent agreement with recent experimental measurements. The previous work of Ballance et al (2004 J. Phys. B: At. Mol. Opt. Phys. 37 4779), for the ionization of the 1s22s22p53s excited state of Ne, has been extended to examine the ionization of the 1s22s22p54s and 1s22s22p55s excited states. Very good agreement is found between R-matrix with pseudostates and time-dependent close-coupling calculations for the 1s22s22p54s excited state. The non-perturbative cross sections for low nl are used to scale semi-classical impact parameter cross sections to high nl. Ionization cross sections for the ground and all excited states will enable the accurate determination of the generalized collisional-radiative ionization rate coefficient for neutral Ne in finite plasmas.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC)

OSTI ID:: 1564659

Journal Information:: Journal of Physics. B, Atomic, Molecular and Optical Physics, Vol. 42, Issue 17; ISSN 0953-4075

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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