Rotational analysis of A–X1 bands of PbF
The rotational analysis of the four bands (0,0), (0,1), (0,2), and (1,0) of the A–X1 system of PbF has been carried out. The bands have been excited in a transformer discharge and photographed in the second order of a 35-ft concave grating spectrograph. The analysis has shown that the bands arise from a [Formula: see text] transition. The rotational constants of the upper and lower states have been determined.