Contribution of near threshold states to recombination in plasmas

F. Robicheaux, S. D. Loch, M. S. Pindzola, C. P. Ballance

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Resonance states in atoms or ions at low energies can control the rates of important plasma processes (e.g., dielectronic recombination). We examine the role of states at negative energies just below the ionization threshold of the recombined system and find that they can contribute as much, or more, to recombination as positive energy states. In plasmas, negative energy states can be populated by three body recombination, photorecombination, or continuum lowering. Properly including these negative energy states in a theoretical treatment of plasma processes can change the thermally averaged rate coefficients and, in some cases, removes much of the sensitivity to the energy of a state.
Original languageEnglish
JournalPhysical Review Letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2010

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