Transition probabilities for triplet levels of Ba(I).

Relative transition probabilities for 40 lines arising from excited triplet levels of Ba(I) have been determined from emission-line intensities in a hollow-cathode discharge. These values were put on an absolute scale by using, where possible, experimental lifetimes from the literature. In addition, absolute transition probabilities were obtained by using line-strength sum rules and the results were found to be in agreement with data derived from lifetime measurements. Comparisons have also been made with previously published experimental and theoretical studies.