Abstract
USING rocket spectroscopy, Hinteregger et al.1 obtained interesting new solar lines, the majority of which could not be classified up to now. Among these lines, two strong lines at 171.1 Å and at 148.5 Å have been seen. We have been able, using the technique of differentiation between different degrees of ionization2,3, to classify these two lines as the 3p6 1S0 – 3p53d 1P1 transition of Fe IX and Ni XI. This line was found to be very prominent in the isoelectronic sequence of A I (Table 1). The foregoing classification is based on the assumption of LS coupling.
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References
Hinteregger, H. E., Hall, L. A., and Schweizer, W., Astrophys. J., 140, 319 (1964).
Fraenkel, B. S., J. App. Phys., 33, 2141 (1962).
Alexander, E., Feldman, U., and Fraenkel, B. S., J. Quant. Spect. and Radiative Transfer, 4, 501 (1964).
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ALEXANDER, E., FELDMAN, U., FRAENKEL, B. et al. 3p6–3p53d Transitions of Fe IX and Ni XI in the Solar Spectrum. Nature 206, 176 (1965). https://doi.org/10.1038/206176a0
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DOI: https://doi.org/10.1038/206176a0
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