Ionization Equilibrium and Radiative Energy Loss Rates for C, N, and O Ions in low-Density Plasmas.
NAVAL RESEARCH LAB WASHINGTON D C
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The results of calculations of the ionization equilibrium and radiative energy loss rates for C, N, and O ions in low-density plasmas are presented for electron temperatures in the range 10,000 to 10,000,000 K about 1 to 1000 eV. The ionization structure is determined using the steady-state corona model, in which electron impact ionization from the ground states is balanced by direct radiative and dielectronic recombination. Using an improved theory, detailed calculations are carried out for the dielectronic recombination rates in which account is taken of all radiative and autoionization processes involving a single-electron electric-dipole transition of the recombining ion. The radiative energy loss processes considered are electron-impact excitation of resonance line emission, direct radiative recombination, dielectronic recombination, and electron-ion bremsstrahlung. For all three elements, resonance line emission resulting from 2s - 2p transitions produces a broad maximum in the energy loss rate near 100,000 K about 10 eV. Author
- Plasma Physics and Magnetohydrodynamics