IR absorption spectra of ice mixtures containing hydroxylamine grown by vapour deposition at 20 K using the AQUILA setup. Left panels: IR spectra acquired prior to irradiation, with the absorption band at 1188 cm⁻¹ indicated by an asterisk. Right panels: evolution of IR absorption spectra during irradiation with 15 keV protons. In each panel, the initial IR spectrum is given by the red trace, and the final spectrum at the end of the irradiation experiment is given by the blue trace.