Stellar non-LTE (filled circles) and LTE (open circles for the stars with log g ≤ 3 and triangles for log g > 3) Pb/Eu abundance ratios as a function of metallicity. The solid line indicates the Solar system meteoritic value. The two dotted lines correspond to a pure r-process production of Pb and Eu predicted by the waiting-point r-process model for a newly born (the low-lying curve) and 13 Gyr old (the up-lying curve) star as given by Roederer et al. (2009). The non-LTE abundances were calculated with S_H = 0.1.