: Thermally averaged electron collision strengths for

I. Bray; A. Burgess; D. V. Fursa; J. A. Tully

doi:10.1051/aas:2000277

Free Access

Issue		Astron. Astrophys. Suppl. Ser. Volume 146, Number 3, November I 2000


Page(s)		481 - 498
DOI		https://doi.org/10.1051/aas:2000277
Published online		15 November 2000

Astron. Astrophys. Suppl. Ser. 146, 481-498 (2000)

$Mathematical equation: ${\rm He} (1\,^1{\rm S},\, 2\,^3{\rm S},\, 2\,^1{\rm S},\, 2\,^3{\rm P} \to \, n\, ^{1,3} L)$$ : Thermally averaged electron collision strengths for $Mathematical equation: $n \leq 5$$

I. Bray¹, A. Burgess², D. V. Fursa¹ and J. A. Tully³

¹ Department of Physics, The Flinders University of South Australia, P.O. Box 2100, Adelaide 5001, Australia
² Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge CB3 9EW, UK
³ Département Gian Domenico Cassini, Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France

Send offprint request to: J.A. Tully, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 2 March 2000
Accepted: 16 August 2000

Abstract

We present thermally averaged collision strengths for electron induced transitions in helium from $Mathematical equation: $\rm 1s^2\,\,^1S$$ , $Mathematical equation: $\rm 1s2s\,\,^{1,3}S$$ , $Mathematical equation: $\rm 1s2p\,\,^3P$$ to higher lying terms $Mathematical equation: ${\rm 1s}nl\,\,^{1,3}L$$ with $Mathematical equation: $n \leq 5$$ . Results are tabulated as functions of temperature in the range $Mathematical equation: $3.75 \leq {\rm log}\,T \leq 5.75 $$ . Cross sections are calculated using the convergent close-coupling (CCC) method.  

Key words: atomic data