|Electron excitation of fine-structure transitions involving the ground state and the metastable state of Fe I|
|J. Pelan and K.A. Berrington|
|Astronomy & Astrophysics Supplement Series, 1997, Vol.122, No.1, pp.177-180|
Low energy electron excitation collision strengths for
fine-structure transitions involving the
ground term and the first excited term of neutral Fe
The model target atom includes the lowest three terms
(, and ) together with four pseudostates
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
which is averaged over a Maxwellian velocity distribution to
obtain effective collision strengths as a function of electron temperature
in the range 100-4000K.
The low-temperature form of the collision strength is established
for the first time for Fe I.