FTIR Laboratory Measurement of O i Spectra in the 0.77–12.5 μm Spectral Range: Rydberg States and Oscillator Strengths

Abstract

Precision laboratory measurements are presented for 135 O i lines in the infrared (including 51 lines not measured previously in the laboratory) using time-resolved Fourier transform infrared spectroscopy in the 800–13,000 cm −1 region. The fine structure of some lines is observed for the first time. Using our linelist together with all relevant measurements from other works, we perform a re-optimization of O i level energies to obtain an internally consistent system of 2 p 3 [ 4 S ] nl levels. Some O i level energies measured long ago are corrected. We also present a long list of oscillator strengths calculated with the help of quantum defect theory.