Astron. Astrophys. Suppl. Ser.
Volume 139, Number 1, October I 1999
|Page(s)||167 - 171|
|Published online||15 October 1999|
Rate coefficients for electron impact excitation of S xv
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
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