Rotational analysis of the C2Σ+ — X2Σ+ system of AlO

Abstract

The 2-0, 1-0, 0-0 and 0-1 bands of the C2Σ+-X2Σ+ system of AlO, lying at 2391.88 A, 2438.35 A, 2487.32 A and 2548.51 A respectively were excited in a low pressure arc and photographed on a 6.6-metre concave grating spectrograph in the third order at a dispersion of 0.37 A/mm. From the rotational analysis of these bands, the following constants have been determined: Be′ = 0.5653 cm.−1 ae′ = 0.0048 cm.−1 Te =40267.0 cm.−1 Be″ = 0.6413 cm.−1 a″ = 0.0057 cm.−1