Rate coefficients for electron impact excitation of S xv

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Issue		Astron. Astrophys. Suppl. Ser. Volume 139, Number 1, October I 1999


Page(s)		167 - 171
DOI		http://dx.doi.org/10.1051/aas:1999386

DOI: 10.1051/aas:1999386

Astron. Astrophys. Suppl. Ser. 139, 167-171

Rate coefficients for electron impact excitation of SXV

E. Kimura¹ - S. Nakazaki¹ - W.B. Eissner² - Y. Itikawa³

Send offprint request: S. Nakazaki

Correspondence to: shinobu@phys.miyazaki-u.ac.jp

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

Received February 02; accepted June 28, 1999

Abstract:

Collision strengths for electron impact excitation of SXV 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 $\ell$ ( $\ell=0,1$ )and 1s3 $\ell$ ( $\ell=0,1,2$ ) configurations. The resulting effective collision strengths are fitted to a polynomial function of $\log(T_{\rm e}/$ K), and rate coefficients are presented in the temperature range between $1\ 10^6$ K and $1\ 10^8$ K.

Key words: atomic data

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