Experimental branching fractions, transition probabilities and oscillator strengths of some levels in Ba I

•Branching fractions (BFs) of Ba I for 108 lines were measured by a high-resolution grating spectrometer with a hollow-cathode lamp.•Corresponding transition probabilities and oscillator strengths were deduced by combining these BFs with the radiative lifetime data in literature.•The uncertainties for most BFs are less than 10%, except for some extremely weak lines.

Branching fractions (BFs) of Ba I for 108 lines including 96 lines from 33 odd-parity levels with the configurations 5dnp (n = 6, 7, 8), 6snp (n = 7, 8, 11, 12), 6snf (n = 5, 6, 11, 16) and 5d4f, as well as 12 lines from 5 even-parity levels with the configurations 6snd (n=7, 9, 12) and 5d6d were measured using a high-resolution grating spectrometer with a hollow-cathode lamp. By combining the data of natural radiative lifetimes published in literature, the transition probabilities and oscillator strengths for these lines were also deduced, and the achieved results are in fair agreements with the previous ones.