Atomic data from the IRON Project. XXI. Electron excitation of fine-structure transitions involving the 3d^64s^2 ^5D ground state and the 3d^74s 5F metastable state of Fe i

Details Atomic data from the IRON Project. XXI. Electron excitation of fine-structure transitions involving the 3d^64s^2 ^5D ground state and the 3d^74s 5F metastable state of Fe i Atomic data from the IRON Project. XXI. Electron excitation of fine-structure transitions involving the 3d^64s^2 ^5D ground state and the 3d^74s 5F metastable state of Fe i

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..122..177p&link_type=abstract

A & A Supplement series, Vol. 122, April I 1997, 177-180.

Astronomy and Astrophysics

Astronomy

11

Atomic Data

Scientific paper

Low energy electron excitation collision strengths for fine-structure transitions involving the 3d^64s^2 ^5D_J ground term and the 3d^74s ^5F_J first excited term of neutral Fe are calculated. The model target atom includes the lowest three terms (5D, 5F and 3F) together with four pseudo-states (5Po, 5Do, 5Fo, 5Go) chosen to represent the dipole polarizability of the ground term and first excited term of Fe. The Breit-Pauli R-matrix method is used to calculate the fine-structure collision strength, which is averaged over a Maxwellian velocity distribution to obtain effective collision strengths as a function of electron temperature in the range 100-4000 K. The low-temperature form of the collision strength is established for the first time for Fe i.

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