Abstract
We have recorded the E2Π1/2–X2Δ3/2 (0,0) and (1,0) bands of TaO at sub-Doppler resolution by intermodulated fluorescence spectroscopy. The data were fitted using a Hamiltonian expressed in a Hund’s case (c) basis set, leading to accurate values for the rotational, lambda-doubling and hyperfine constants of the upper state, which could be definitively assigned as 2Π1/2 for the first time. The E2Π1/2 state has an energy of T0=15876.5764(2) cm−1 and a vibrational interval of ΔG1/2=925.3164(3) cm−1.
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