Transition probabilities for infrared and visible lines in neutral barium

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From narrow-band and broadband spectra of barium hollow-cathode discharges obtained with the aid of a Fourier-transform spectrometer, we have determined the branching fractions of five moderately excited levels and the branching ratios between the infrared lines originating in the resonance level 6s6p ¹^∘₁ of the neutral barium atom. By combining our emission measurements with lifetime and absorption data taken from the literature we were able to derive transition probabilities for 13 visible and 16 infrared transitions as well as upper limits for the A values of 15 additional infrared lines. The resulting transition probabilities cover five decades.