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Fig. 7


[Eu/Ba] as a function of [Fe/H]. HD 140283 is represented by the red star. Green crosses represent data from the literature (see text) for metal-poor stars; blue squares are the stars with only an upper limit of europium determined. The dotted line indicates the solar system r-process abundance ratio (Simmerer et al. 2004), and the solid line is the solar system value.

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