Electron-Impact Ionization of C+ in Both Ground and Metastable States

Ludlow, J. A.; Loch, S. D.; Pindzola, Michael S.; Ballance, C. P.; Griffin, D. C.; Bannister, Mark E

doi:10.1103/PhysRevA.78.052708

Title: Electron-Impact Ionization of C⁺ in Both Ground and Metastable States

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.78.052708· OSTI ID:965338

Ludlow, J. A. ^[1]; Loch, S. D. ^[1]; Pindzola, Michael S. ^[1]; Ballance, C. P. ^[2]; Griffin, D. C. ^[2]; Bannister, Mark E ^[3]

Auburn University, Auburn, Alabama
Rollins College, Winter Park, FL
ORNL

Electron-impact ionization cross sections are calculated for the ground and metastable states of C{sup +}. Comparisons between perturbative distorted-wave and nonperturbative time-dependent close-coupling calculations find reductions in the peak direct ionization cross sections due to electron coupling effects of approximately 5% for ground state C{sup +} and approximately 15% for metastable state C{sup +}. Fairly small excitation-autoionization contributions are found for ground state C{sup +}, while larger excitation-autoionization contributions are found for metastable state C{sup +}. Comparisons between perturbative distorted-wave and nonperturbative R-matrix with pseudostates calculations find reductions in the peak total ionization cross sections due to electron coupling effects of approximately 15-20% for ground state C{sup +} and approximately 25-35% for metastable state C{sup +}. Finally, comparisons between theory and experiment find that present and previous C{sup +} crossed-beam measurements are in excellent agreement with ground state nonperturbative R-matrix with pseudostates calculations for total ionization cross sections. Combined with previous non-perturbative calculations for C, C{sup 2+}, and C{sup 3+}, accurate ionization cross sections and rate coefficients are now available for the ground and metastable states of all carbon ion stages.

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

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: DE-AC05-00OR22725

OSTI ID:: 965338

Journal Information:: Physical Review. A, Vol. 78, Issue 5; ISSN 1050-2947

Country of Publication:: United States

Language:: English

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Title: Electron-Impact Ionization of C⁺ in Both Ground and Metastable States