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

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

Journal Article · Mon Dec 31 23:00:00 EST 2007 · 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.

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

Sponsoring Organization:: DOE Office of Science; SC USDOE - Office of Science (SC)

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 965338

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

Country of Publication:: United States

Language:: English

References (23)

RMATRX1: Belfast atomic R-matrix codes Berrington, Keith A.; Eissner, Werner B.; Norrington, Patrick H. Computer Physics Communications, Vol. 92, Issue 2-3 https://doi.org/10.1016/0010-4655(95)00123-8	journal	December 1995
An R -matrix with pseudo-states calculation of electron-impact excitation in C ² Mitnik, D. M.; Griffin, D. C.; Ballance, C. P. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 36, Issue 4 https://doi.org/10.1088/0953-4075/36/4/306	journal	February 2003
Updating of ionization data for ionization balance evaluations of atoms and ions for the elements hydrogen to germanium Mattioli, M.; Mazzitelli, G.; Finkenthal, M. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 40, Issue 18 https://doi.org/10.1088/0953-4075/40/18/002	journal	September 2007
Measurement of the cross section for electron impact ionization of multi-electron ions. II. N ²⁺ to N ³⁺ and C ⁺ to C ²⁺ Aitken, K. L.; Harrison, M. F. A.; Rundel, R. D. Journal of Physics B: Atomic and Molecular Physics, Vol. 4, Issue 9 https://doi.org/10.1088/0022-3700/4/9/008	journal	September 1971
Non-Perturbative Quantal Methods for Electron–Atom Scattering Processes Griffin, D. C.; Pindzola, M. S. Advances In Atomic, Molecular, and Optical Physics, Vol. 54, 203-235 https://doi.org/10.1016/S1049-250X(06)54004-2	book	January 2007
Coulomb integrals: tables and sum rules Burgess, A. Journal of Physics B: Atomic and Molecular Physics, Vol. 7, Issue 12 https://doi.org/10.1088/0022-3700/7/12/003	journal	August 1974
Generalized collisional radiative model for light elements. Part B: Data for the Be isonuclear sequence Loch, S. D.; Pindzola, M. S.; Ballance, C. P. Atomic Data and Nuclear Data Tables, Vol. 94, Issue 2 https://doi.org/10.1016/j.adt.2007.11.002	journal	March 2008
Generalised collisional-radiative model for light elements. A: Data for the Li isonuclear sequence Loch, S. D.; Colgan, J.; Witthoeft, M. C. Atomic Data and Nuclear Data Tables, Vol. 92, Issue 6 https://doi.org/10.1016/j.adt.2006.04.001	journal	November 2006
Photoionization - excitation of helium using an R -matrix with pseudostates method Gorczyca, T. W.; Badnell, N. R. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 30, Issue 17 https://doi.org/10.1088/0953-4075/30/17/017	journal	September 1997
Theoretical calculations of the contributions of excitation autoionization to electron-impact ionization in ions of the transition series of elements Griffin, D. C.; Bottcher, C.; Pindzola, M. S. Physical Review A, Vol. 25, Issue 3 https://doi.org/10.1103/PhysRevA.25.1374	journal	March 1982
Absolute cross sections for electron-impact single ionization of Ne q + ( q =2,4–6) ions Bannister, M. E. Physical Review A, Vol. 54, Issue 2 https://doi.org/10.1103/PhysRevA.54.1435	journal	August 1996
Electron-impact ionization of C ³⁺ using the R -matrix pseudo-state method Mitnik, D. M.; Pindzola, M. S.; Griffin, D. C. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 32, Issue 17 https://doi.org/10.1088/0953-4075/32/17/101	journal	August 1999
Electron-impact dissociation of C H 2 + ions: Measurement of C H + and C + fragment ions Vane, C. R.; Bahati, E. M.; Bannister, M. E. Physical Review A, Vol. 75, Issue 5 https://doi.org/10.1103/PhysRevA.75.052715	journal	May 2007
Influence of long-lived metastable levels on the electron-impact single ionization of C 2 + Loch, S. D.; Witthoeft, M.; Pindzola, M. S. Physical Review A, Vol. 71, Issue 1 https://doi.org/10.1103/PhysRevA.71.012716	journal	January 2005
Electron-impact ionization of the boron atom Berengut, J. C.; Loch, S. D.; Pindzola, M. S. Physical Review A, Vol. 76, Issue 4 https://doi.org/10.1103/PhysRevA.76.042704	journal	October 2007
Time-dependent close-coupling calculations for the electron-impact ionization of carbon and neon Pindzola, M. S.; Colgan, J.; Robicheaux, F. Physical Review A, Vol. 62, Issue 4 https://doi.org/10.1103/PhysRevA.62.042705	journal	September 2000
On the effects of the two-body non-fine-structure operators of the Breit - Pauli Hamiltonian Badnell, N. R. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 30, Issue 1 https://doi.org/10.1088/0953-4075/30/1/005	journal	January 1997
Electron Impact Ionization of C ⁺ , N ⁺ and P ⁺ Ions Yamada, Ichihiro; Danjo, Atsunori; Hirayama, Takato Journal of the Physical Society of Japan, Vol. 58, Issue 5 https://doi.org/10.1143/JPSJ.58.1585	journal	May 1989
The validity of classical trajectory and perturbative quantal methods for electron-impact ionization from excited states in H-like ions Griffin, D. C.; Ballance, C. P.; Pindzola, M. S. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 38, Issue 12 https://doi.org/10.1088/0953-4075/38/12/L01	journal	June 2005
General Hartree-Fock program Froese Fischer, Charlotte Computer Physics Communications, Vol. 43, Issue 3 https://doi.org/10.1016/0010-4655(87)90053-1	journal	February 1987
Direct ionization of low-charge Li-like ions using a small pseudo-state basis Badnell, N. R.; Griffin, D. C. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 33, Issue 16 https://doi.org/10.1088/0953-4075/33/16/302	journal	July 2000
Ionization rate coefficients for the elements hydrogen through zinc Dere, K. P. Astronomy & Astrophysics, Vol. 466, Issue 2 https://doi.org/10.1051/0004-6361:20066728	journal	February 2007
Electron-impact excitation of neon: a pseudo-state convergence study Ballance, C. P.; Griffin, D. C. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 37, Issue 14 https://doi.org/10.1088/0953-4075/37/14/008	journal	July 2004

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