| Electron impact excitation of Fe XX |
| K. Butler and C.J. Zeippen |
| Astronomy & Astrophysics, 2001, Vol.372, pp.1078 |
Collisional data between 86 levels of the 
and 
complexes of
N-like iron are presented. The data have been obtained in a Breit-Pauli
relativistic approximation and include resonance contributions by the use of
close-coupling wavefunctions. The R-matrix package described by Hummer et
al.
has been used to solve the close-coupling
equations at several thousand energy points for an extensive target leading
to collision strengths accurate to better than 20%.