Abstract
view Abstract Citations (54) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Integral and Differential Cross Sections for Electron Impact Ionization Clark, R. E. H. ; Abdallah, J., Jr. ; Mann, J. B. Abstract Calculated Coulomb-Born exchange cross sections for hydrogenic ions from 1s through 6h exist in the literature. In this paper, an analytic fit formula to these cross sections is derived by fitting simultaneously to n, l, and u where n is the principal quantum number, l is the orbital angular momentum, and u is the impact electron energy in threshold units. The resulting fit, which is easily integrated over a Maxwellian velocity distribution, reproduces the calculated cross sections to better than 10 percent. A prescription is given for applying the cross sections to nonhydrogenic ions. In addition, the cross sections differential with respect to the energy of the scattered electron are fitted. Publication: The Astrophysical Journal Pub Date: November 1991 DOI: 10.1086/170685 Bibcode: 1991ApJ...381..597C Keywords: Atomic Physics; Computational Astrophysics; Coulomb Collisions; Electron Impact; Ionization Cross Sections; Plasma Physics; Cosmic Plasma; Local Thermodynamic Equilibrium; Space Plasmas; Plasma Physics; ATOMIC PROCESSES; NUMERICAL METHODS full text sources ADS |
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