Fourier transform spectroscopy of the Herzberg I bands of O2

Fourier transform spectroscopic measurements of the absorption bands of the Herzberg I system [Formula: see text] of O 2 , have been made in the wavelength region 240–270 nm. Rotational line positions are determined with an accuracy of 0.005 cm −1 , and rotational term values are presented for the vibrational levels, ν = 4–11. Molecular constants of these levels are also presented. Interactions with the [Formula: see text] state are observed at …