TY - JOUR
T1 - Electron-impact ionization of C+ in both ground and metastable states
AU - Ludlow, J. A.
AU - Loch, S. D.
AU - Pindzola, M. S.
AU - Ballance, C. P.
AU - Griffin, D. C.
AU - Bannister, M. E.
AU - Fogle, M.
PY - 2008/11/14
Y1 - 2008/11/14
N2 - Electron-impact ionization cross sections are calculated for the ground and metastable states of C+. 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+ and approximately 15% for metastable state C+. Fairly small excitation-autoionization contributions are found for ground state C+, while larger excitation-autoionization contributions are found for metastable state C+. 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+ and approximately 25-35% for metastable state C+. Finally, comparisons between theory and experiment find that present and previous C+ 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, C2+, and C3+, accurate ionization cross sections and rate coefficients are now available for the ground and metastable states of all carbon ion stages.
AB - Electron-impact ionization cross sections are calculated for the ground and metastable states of C+. 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+ and approximately 15% for metastable state C+. Fairly small excitation-autoionization contributions are found for ground state C+, while larger excitation-autoionization contributions are found for metastable state C+. 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+ and approximately 25-35% for metastable state C+. Finally, comparisons between theory and experiment find that present and previous C+ 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, C2+, and C3+, accurate ionization cross sections and rate coefficients are now available for the ground and metastable states of all carbon ion stages.
UR - http://www.scopus.com/inward/record.url?scp=56849094203&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.78.052708
DO - 10.1103/PhysRevA.78.052708
M3 - Article
AN - SCOPUS:56849094203
SN - 1050-2947
VL - 78
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 5
M1 - 052708
ER -