Atomic partition functions for iron

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Atomic Energy Levels, Atomic Weights, Cosmic Plasma, Ionization Potentials, Iron, Astronomical Catalogs, Atomic Excitations, Quantum Mechanics

Scientific paper

Numerical values of the atomic partition functions (APF), U(r), for Fe I, Fe II and Fe III are given for the temperature range 2000-40000 K, and for various lowering of the ionization energy (in the range 0.01 to 2.00 eV). In the calculations of the APF all quantum energy levels have been taken into account, including those lying above the normal ionization energy. The values of APF are larger than those published previously; however, their ratios U(r+1)/U(r) are smaller.

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