Upper panel: methanol destruction cross section as a function of stopping power in the electron regime. Red diamonds show data from de Barros et al. (2011), the magenta triangle represents 30 keV He⁺ (Baratta et al. 2002), the green circle shows 200 keV H⁺ (Brunetto et al. 2005), and the blue square shows data from this work. The dashed line represent the best least-squares fit to the cross section, and the filled region delineates the 95% interval confidence. See text for details. Lower panel: corresponding methanol radiochemical destruction yield.