Vibrational analysis of the 3Π1–X1Σ+ band systems of SiCl+

Abstract

The emission spectrum of the SiCl+ radical cation, excited by the thermal energy He+ + SiCl4 reaction, has been observed and vibrationally analyzed in the 310–350 nm region. The two new subband systems, [Formula: see text] and a3Π1–X1Σ+, have been identified. The vibrational assignments were confirmed by the observed isotope band heads of Si35Cl+ and Si37Cl+. The following molecular constants (in cm−1) have been obtained for the X1Σ+, [Formula: see text], and a3Π1, states.[Formula: see text]