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