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Dielectronic recombination rates, ionization equilibrium, and radiative emission rates for MN ions in low-density high-temperature plasmas. Memorandum report

Technical Report ·
OSTI ID:5593330
;

The analysis of optically-thin far-ultraviolet and x-ray emission lines of multiply-charged ions is one of the basic methods for determining the temperatures and densities of laboratory and astrophysical plasmas. In addition, the energy balance in these plasmas can be significantly influenced by the emission of radiation from relatively low concentrations of multiple-charged atomic ions. Because the populations of the excited levels are expected to depart substantially from their local thermodynamic equilibrium values a detailed treatment of the elementary collisional and radiative processes must be employed in order to predict the emission line intensities. In this investigation the authors present the results of calculations based on a corona equilibrium model in which a detailed evaluation is made of the dielectronic recombination rate coefficients. The ionization and autoionization following inner-shell electron excitation from each ground state are balanced by direct radiative and dielectronic recombination. The spectral line intensities emitted by the low-lying excited states, which are assumed to undergo spontaneous radiative decay in times that are short compared with the collision time, are evaluated in terms of the corona ionization equilibrium distributions of the ground states and their electron-impact excitation states.

Research Organization:
Naval Research Lab., Washington, DC (USA)
OSTI ID:
5593330
Report Number(s):
AD-A-129758/9; NRL-MR-5105
Country of Publication:
United States
Language:
English

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Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BREMSSTRAHLUNG
CHARGED PARTICLES
COLLISIONS
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
HIGH TEMPERATURE
ION SPECTROSCOPY
IONS
MANGANESE IONS
MULTICHARGED IONS
RADIATIONS
SPECTROSCOPY