Structure of the Barium Resonance Line

For the Ba i line $6s^2{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}-6s6p{}_{}{}^1{}_{}{}^{}P_1^{}{}_{}{}^{}$, the structure ${0.0}^{138}{[-{3.1}_{\frac{5}{2}}, +{9.9}_{\frac{3}{2}}, +{17.7}_{\frac{1}{2}}]}^{137}+3^{136}{[-{0.3}_{\frac{5}{2}}, +{11.4}_{\frac{3}{2}}, +{18.4}_{\frac{1}{2}}]}^{135}+5^{134}$ is suggested as being consistent with the experimental evidence (subscripts are ${}_{}{}^1{}_{}{}^{}P_1^{}{}_{}{}^{}$ $F$-values; superscripts, isotopes; numbers on the line, wave numbers relative to isotope 138, expressed in mK ≡ ${10}^{-3\mathrm{}}$ ${\mathrm{cm}}^{-1\mathrm{}}$).