The Spectrum of Al I and Al II in the Infrared (1800 < σ < 9000 cm⁻¹)

The spectrum of Al I and Al II produced by a hollow-cathode discharge has been observed by the Fourier transform spectroscopy technique between 1800 and 9000 cm-1. These observations have allowed an extension of the term systems of Al I and Al II. The results are also used for revising the identification of Al I lines in the solar photospheric spectrum.