High-resolution emission bands of the A²Π – X²Π system of SO⁺

Abstract

The A2Πi → X2Πr visible band system of SO+ has been recorded photographically at high resolution. Molecular constants for the A and X states have been fitted to the measured line positions of the 0–5, 0–6, 1–5, and 1–6 bands. Λ-type doubling was resolved completely for most of the lines of the 2Π1/2 – 2Π1/2 sub-bands, and has led to the first reported values of the splitting constants p′ and p″. All the estimated constants have been merged with constants obtained previously from medium-resolution spectra for other levels of the X2Π ground state. A self-consistent set of constants is reported for ν′ = 0 and 1 and for ν = 4–9, together with revised equilibrium constants.

Mid-infrared diode laser spectroscopy of SO+

“…In a parallel study, Coxcon and Foster recorded nine bands of the A 2 P i À X 2 P r system [14]. Hardwick et al [15] re-investigated the 0-5, 0-6, 1-5 and 1-6 bands in higher resolution and reported a self-consisted molecular constants for t 0 = 0 and 1 levels of A and for t 00 = 4-9 levels of X. The A 2 P i À X 2 P r system of SO + have also been observed in rotationally cold supersonic expansion and the most complete molecular constants for the X 2 P r and A 2 P i states have been obtained [16,17].…”

Investigation of Spectroscopic Properties and Spin-Orbit Splitting in the X2Π and A2Π Electronic States of the SO+ Cation

“…The comparison demonstrates that the present calculations with the core-valence correlation and scalar relativistic corrections and Davidson modification can improve the quality of spectroscopic parameters. For convenient comparison, here we collect the spectroscopic results obtained by the MRCI+Q/AV5Z +CV+DK calculations together with the available experimental [10–15,17,20] and other theoretical [9,24,25] results in Table 2.…”

“…Hardwick et al . [15] in the same year recorded 0–5, 0–6, 1–5 and 1–6 bands of the A 2 Π-X 2 Π band at high resolution. The corresponding rotational analyses were also made in their work [14,15].…”

“…[15] in the same year recorded 0–5, 0–6, 1–5 and 1–6 bands of the A 2 Π-X 2 Π band at high resolution. The corresponding rotational analyses were also made in their work [14,15]. A number of spectroscopic parameters and molecular constants were determined for the two electronic states in these investigations [10–15].…”

“…In the past more than thirty years, a number of experiments [10–15,17,18,20,22] have been made to determine the spin-orbit coupling constant ( A 0 ) of the SO + (X 2 Π 1/2, 3/2 ) and SO + (A 2 Π 1/2, 3/2 ). Of these experiments, the first one was made by Dyke et al .…”