Analysis of the v″₂ = 1 manifold in the òΣ⁺-[Xtilde]²Π emission spectrum of N₂O⁺

Abstract

Bands in the Ã-[Xtilde] emission spectrum of N₂O⁺ photographed under high resolution which involve all four spin-vibronic levels ν₂ = 1 of the [Xtilde] ²Π manifold have been analysed. The vibronic splitting due to Renner-Teller and Herzberg-Teller interactions is interpreted in terms of an effective Renner parameter ε_eff whose value is determined to be -0·176. The relative intensity of the forbidden 2⁰ ₁ transition can be accounted for by Herzberg-Teller coupling between the [Xtilde] ²Π and à ²Σ⁺ states.