Charge-transfer excitation in collisions of slow H+ and H3+ ions with CO2 molecules under beam conditions

► Luminescence spectra from H+ and H3+ + CO2 were recorded. ► The bands of the B˜2Σ2+ − X˜2Πg and A˜2Πu − X˜2Πg transitions can be notice. ► The (5-1000) eVlab collision energy range. ► Excitation function for both systems studied were taken. ► No evidence of fragmentation CO2 in the systems studied.