: Thermally averaged electron collision strengths for

Free access article

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


Page(s)		481 - 498
DOI		http://dx.doi.org/10.1051/aas:2000277

DOI: 10.1051/aas:2000277

Astron. Astrophys. Suppl. Ser. 146, 481-498

He(1¹S, 2³S, 2¹S, 2³P $\to$ n ^1,3L): Thermally averaged electron collision strengths for n ≤ 5

I. Bray¹ - A. Burgess² - D.V. Fursa¹ - J.A. Tully³

Send offprint request: J.A. Tully, e-mail: tully@obs-azur.f

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

Received March 2; accepted August 16, 2000

Abstract:

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

Key words: atomic data

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He(11S, 23S, 21S, 23P n 1,3L): Thermally averaged electron collision strengths for n ≤ 5

Abstract:

He(1¹S, 2³S, 2¹S, 2³P $\to$ n ^1,3L): Thermally averaged electron collision strengths for n ≤ 5