RESEARCH ARTICLE VUV spectroscopic study of the B′ ′ B̄1+u state of H2

Spectral lines, probing rotational quantum states J ′ = 0, 1, 2 of the inner well vibrations (v ′ ≤ 8) in the B ′′B̄1+u state of molecular hydrogen, were recorded in high resolution using a vacuum ultraviolet Fourier transform absorption spectrometer in the wavelength range 73–86 nm. Accurate line positions and predissociation widths are determined from a fit to the absorption spectra. Improved values for the line positions are obtained, while the predissociation widths agree well with previous investigations