Accelerated Recombination due to Resonant Deexcitation of Metastable States

Abstract

In a recombining plasma the metastable states are known to accumulate population thereby slowing down the recombination process. We show that an account of the doubly-excited autoionizing states, formed due to collisional recombination of metastable ions, results in a significant acceleration of recombination. A fully time-dependent collisional-radiative (CR) modeling for stripped ions of carbon recombining in a cold dense plasma demonstrates an order of magnitude faster recombination of He-like ions. The CR model used in calculations is discussed in detail.

15 pages, 4 figures; to be published in JQSRT

References in corpus (2)

• Ionization balance for optically thin plasmas: rate coefficients for all atoms and ions of the elements H to Ni
• Quantum-mechanical calculation of Stark widths of Ne VII n=3, $\Delta n=0$ transitions

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