Sextet transitions in Fe II

Details Sextet transitions in Fe II Sextet transitions in Fe II

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...102..351n&link_type=abstract

Astronomy and Astrophysics, vol. 102, no. 3, Oct. 1981, p. 351-358.

Astronomy and Astrophysics

Astrophysics

86

Atomic Energy Levels, Interstellar Matter, Iron, Particle Collisions, Spectral Energy Distribution, Transition Probabilities, Collision Rates, Electric Dipoles, Electron Scattering, Interstellar Radiation

Scientific paper

Configurations which give rise to sextet and octet Fe II interstellar lines are studied. Radial functions which minimize the sum of total energies of a(6)D, a(6)S, z(6)D(0), z(6)F(0), and z(6)P(0) in the coupling calculations were chosen, and calculated in adjustable Thomas-Fermi potentials. Observed and calculated energy separations are given, along with electric dipole transition probabilities, and the predicted multiplets are compared with observations. Collision strengths are also provided, and seven new interstellar resonance lines attributable to Fe II ions are identified, and verified by comparison to the oscillator strengths derived for the corresponding relations. The highest collision rate from a(6)S is projected to lead to x(6)P(0), followed by decay in gamma 1786 (UV 191) with a branching ratio of 0.92.

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