IR transmittance spectra in optical depth-scale (P polarization) of CH₃OH:N₂ ice (about 250 nm thick) deposited at 16 K before (dashed line), after bombardment with 1.58 × 10¹⁴ 200 keV H⁺ cm^-2 alone (dose = 4 eV/16u; dotted line) and after simultaneous processing with 1.29 × 10¹⁴ 200 keV H⁺ cm^-2 and 1.76 × 10¹⁸ photons cm^-2 (total dose = 37 eV/16u; solid line). N-bearing species such as HNCO, N₂O, OCN⁻, HCN, and CH₂N₂ are formed.