Astrophysical Journal, Supplement Series
This paper combines the precise determination of the energy levels of 4He I from calculations and experiments with theoretical transition probabilities to present multiplet tables and finding lists for the fine structure of the helium atom. The tabulated transition rates and oscillator strengths include corrections for singlet-triplet mixing and spin-orbit coupling, but not the higher order relativistic terms nor the finite nuclear mass, although the latter are tabulated for future use. The results are consistent with laboratory lifetimes and oscillator strengths, but very few measurements are accurate enough to be stringent tests. An Appendix discusses the corrections for finite nuclear mass. © 2007. The American Astronomical Society. All rights reserved.
Drake, Gordon W. F. and Morton, D. C.. (2007). A multiplet table for neutral helium (4He I) with transition rates. Astrophysical Journal, Supplement Series, 170 (1), 251-260.