| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 139, Number 1, October I 1999
|
|
|---|---|---|
| Page(s) | 167 - 171 | |
| DOI | https://doi.org/10.1051/aas:1999386 | |
| Published online | 15 October 1999 | |
Rate coefficients for electron impact excitation of S xv
1
Department of Materials Science, Faculty of Engineering, Miyazaki University, Miyazaki 889-2192, Japan
2
Fakultät für Physik und Astronomie, Ruhr-Universität, D-44780 Bochum, Germany
3
Institute of Space and Astronautical Science, Yoshinodai, Sagamihara 229-8510, Japan
Send offprint request to: S. Nakazaki
Received:
2
February
1999
Accepted:
28
June
1999
Collision strengths for electron impact
excitation of S xv are calculated in a close-coupling approach.
The nineteen lowest LS states are included in the calculation.
Rate coefficients are obtained for transitions from the ground
1s2
1S0 state to the
fine-structure levels of all excited states of 1s2
(
)
and 1s3 (
) configurations.
The resulting effective collision strengths are fitted to a polynomial
function of 
K), and rate coefficients are presented in the
temperature range between 
K and 
K.
Key words: atomic data
© European Southern Observatory (ESO), 1999