Transition probabilities for forbidden lines: the silicon isoelectronic sequence from S III in to Sn XXXVII
Open Access
- 1 December 1983
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 205 (4) , 1085-1096
- https://doi.org/10.1093/mnras/205.4.1085
Abstract
New calculations of transition probabilities for all the 3p2 forbidden lines, for alternate ions from S III to Sn XXXVII, are presented and discussed. Radial wavefunctions and energy levels were calculated for the 3p2 and five low interacting configurations, using the HXR self-consistent field method and Slater–Condon theory. Detailed relativistic corrections and configuration mixing effects were included. Wavelengths and A values were computed in intermediate coupling with Z-smoothed semi-empirical coupling transformations. Results for Z ≼ 28 agree well with those of Mendoza & Zeippen who used a very different model, and confirm significant improvements over earlier published A values. There is also good agreement with observed energy separations, which now extend to Z = 42. The present results extend the theoretical data to zinc and beyond to Z = 50, thus better illustrating trends in magnetic dipole and electric quadrupole oscillator strengths with Z.Keywords
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