Photodissociation and photodetachment of molecular negative ions. IX. Atmospheric ions at 2484 and 3511 Å

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Abstract
A rare‐gas–halogen laser has been used with a drift‐tube mass spectrometer to extend measurements of the photodestruction cross sections of atmospheric negative ions to 2484 Å. Ions studied include O−, O2−, O3−, O4−, CO3−, CO4−, HCO3−, NO2−, O2−⋅NO, and NO3−; hydrates of many of these ions were also studied. As expected, the cross sections for most of the ions were substantially larger at 2484 Å than at wavelengths longer than 3500 Å.