Comparison of SmII transition probabilities

This Research Note provides a comparison of experimental atomic transition probabilities in Sm II from two recent publications. Basic data of this type for rare-earth spectra, including Sm II, are very difficult to determine using ab-initio theoretical methods. Experimental programs are underway in several laboratories to determine these data for ongoing astrophysical studies of the origins of the chemical elements. The two recent and nearly simultaneous publications, which were based on very different experimental methods, provide transition probabilities in good, but not perfect, agreement.