The best fit Ba ii 4554 Å lines for each star, using a Gaussian broadening technique. Each figure displays the observed Ba profile (diamonds) and the best fit synthetic profile (solid line), which includes the error on f_odd (dashed line). We have also included a schematic of the odd and even isotopes for reference. The lower panel of each figure shows the residuals (obs-syn) of each fit as a percentage. For reference we have included HD 140283, which was analysed in Gallagher et al. (2010).