Hydroxylamine IR band decay as a function of proton fluence. Left panels: normalised absorption band area decay for three distinct IR vibrational modes (black squares: NH₂ wagging mode; red circles: OH stretching mode; blue triangles: NO stretching mode). We note that lines between the individual data points are not fits and are plotted solely to guide the eye. Right panels: natural logarithmic representation of data plotted in the left panels. We note that, in this case, the straight lines are linear trend lines fitted to data points at low proton fluences.