Abstract
A rotational analysis has been performed on the 0–0, 1–1, 1–0, and 2–1 bands of the A2Π–X2Σ+ band system of the BeCl molecule photographed at high resolution in emission from a microwave discharge. The following principal molecular constants have been obtained.[Formula: see text]Inspection of the low J value lines shows that the A2Π state is a regular state derived from the electronic configuration σ2σ2π4π although the Λ-doubling constants p and q are of opposite sign.
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