Abstract
The emission spectrum of HfO has been investigated in the 400 nm to 5 μm spectral region with a Fourier transform spectrometer. The bands were excited in a hafnium hollow cathode lamp in the presence of neon and a trace of oxygen. In the 6900-8000 cm−1 region, four new sequences of bands were observed with the 0-0 Q heads at 7060 cm−1, 7355.4 cm−1, 7376.8 cm−1, and 7929.5 cm−1. These bands have been identified as the 3Π0+-3Δ1, 3Π0−-3Δ1, 3Π1-3Δ2 and 3Π2-3Δ3 subbands of the b3Π-a3Δ transition. The rotational analysis of the 0-0 and 1-1 bands of each subband has been performed and the equilibrium rotational constants for each spin component of the b3Π and a3Δ states have been obtained.
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