Impact of changing the isotopic ratio (²²Ne/²⁰Ne)_CRS at the source on the propagated F/Si ratio illustrated for three equally plausible updates of the F production cross sections (different line styles). The reference calculation is based on the SS value (Lodders 2003), and the various curves (from top to bottom) illustrate that growing values lead to decreasing F/Si ratios. (See text for discussion.)