[en] Cross sections for emission of the N₂O⁺ (A²Σ⁺ X²PIsub(i)) system (3300-4000 A) from different vibrational upper levels have been measured for 0-2000 eV electrons on N₂O. Lifetimes are presented for five different A²Σ⁺ vibrational states. They range from 260 ns for the A²Σ⁺ (0,0,0) to 236 ns for the A²Σ⁺ (0,0,1) level. It has been found that predissociation of the A²Σ⁺ (1,0,0) level must be far less important than assumed previously by other groups. Another emission, between 2200-3300 A, has been studied. It has an appearance-potential of 15 eV, 1.4 eV below that of the N₂O⁺ (A²Σ⁺-X²PIsub(i)) radiation, resulting from dissociative excitation of N₂O via a super excited state. For the lifetime of the upper state of this emission the authors find 1.7 (+-0.1) μs, slightly varying over the band system. (Auth.)