Vibrationally Hot Bands of the SiCN Ã ²Δ – X̃ ²Π System

Abstract

We have generated SiCN in supersonic free jet expansions and observed the laser induced fluorescence (LIF) spectrum. In addition to the vibronic bands from the vibrationless level of the X̃ (2)Π state, the hot bands from the bending vibrational level, à (01(1)0) (2)Φ - X̃ (01(1)0) (2)Δ and à (01(1)0) (2)Π - X̃ (01(1)0) (2)Σ((-)), have been measured. The rotational energy levels were reasonably analyzed as those of the (2)K' - (2)K″ transitions, but their line intensities calculated from the Hönl-London factors…