| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 122, Number 1, April I 1997
|
|
|---|---|---|
| Page(s) | 177 - 180 | |
| DOI | https://doi.org/10.1051/aas:1997328 | |
| Published online | 15 April 1997 | |
Atomic data from the IRON Project
XXI. Electron excitation of fine-structure transitions involving the
ground state and the
metastable state of Fe i
Department of Applied Mathematics & Theoretical Physics, The Queen's University, Belfast, BT7 1NN, UK
Send offprint request to: J. Pelan
Received:
19
June
1996
Accepted:
15
July
1996
Low energy electron excitation collision strengths for
fine-structure transitions involving the
ground term and the 
first excited term of neutral Fe
are calculated.
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
collision strength,
which is averaged over a Maxwellian velocity distribution to
obtain effective collision strengths as a function of electron temperature
in the range 
.
The low-temperature form of the collision strength is established
for the first time for Fe i.
Key words: atomic data
© European Southern Observatory (ESO), 1997