Forbidden transitions in Li-like ions: Compact effective collision strengths for 2s - n(s),n(d) where N = 3, 4, 5$

Details Forbidden transitions in Li-like ions: Compact effective collision strengths for 2s - n(s),n(d) where N = 3, 4, 5$ Forbidden transitions in Li-like ions: Compact effective collision strengths for 2s - n(s),n(d) where N = 3, 4, 5$

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..131..145b&link_type=abstract

Astronomy and Astrophysics Supplement, v.131, p.145-152

Astronomy and Astrophysics

Astrophysics

3

Li-Like Ions, Electron Excitation, Compact Atomic Data

Scientific paper

Using an extension of the method for compacting atomic data set out by \cite[Burgess & Tully (1992)]{bur92}, we make concise fits to a selection of the set of collision strengths {sl Omega } given by \cite[Zhang et al. (1990)]{zha90} for Li-like ions from O(+5) to U(+89) . We carry out thermal averaging and fit the resulting effective collision strengths {sl Upsilon }. A compact 5x5 or 4x4 table of cardinal values for each transition allows one to reproduce the T and Z dependent {sl Upsilon } to better than 1 per cent. The present study is for the forbidden transitions 2s -> 3s,4s,5s and 2s -> 3d,4d,5d. Appendix available on the on-line version of A\&AS.

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