Hyperfine Structure of the Spectrum of Al II. Part II

抄録

As a supplement to the previous work on the anomalous hfs. of the spectrum of Al II, the structure of the multiplet λ3587.4−λ3586.5 (3³D–4³F) was studied. The calculated structure of this multiplet was found to be in harmony with that observed by means of interferometers. The triplet separations α=3³D₃–3³D₁ and β=3³D₂–3³D₁ were found to be −2.20 cm⁻¹ and −1.02 cm⁻¹ respectively (the 3³D term being inverted). The hyperfine energy levels of the n³D (n=3,4,5) series are represented diagramatically (in Fig. 4) in order to show how they depart from the ordinary coupling {(L·S)J·I} progressively towards the coupling {(S·I)U·L} as n increases.