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A&A Supplement series, Vol. 121, January 1997, 187 - 190

Received February 23; accepted May 20, 1996

On the interpolation of isoelectronic data

A. Burgesstex2html_wrap1079 - M.C. Chidichimotex2html_wrap1081 - J.A. Tullytex2html_wrap1083

Send offprint request: A. Burgess

tex2html_wrap1085  Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge CB3 9EW, UK
tex2html_wrap1087  Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
tex2html_wrap1089  D‚partement G.D. Cassini, Observatoire de la Côte d'Azur, BP. 4229, 06304 Nice Cedex 4, France


The program developed by Burgess for spline fitting and interpolating collision strengths can also be used to do isoelectronic fits. Instead of treating tex2html_wrap_inline1061 or tex2html_wrap_inline1063 one inputs an arbitrary quantity A(Z) that is a function of nuclear charge number Z. In this way isoelectronic atomic data can be visualised and compacted in an easy manner which allows for accurate interpolation along a sequence. Four illustrative applications are provided.

keywords: isoelectronic sequence -- atomic data -- spline interpolation

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