Abstract
This paper contains the analysis of the C(2) 1Π u state of Na 2 molecule based on a large data set (3030 lines) obtained from a polarization labeling spectroscopy experiment on the C 1 Π u ← X 1 Σ g + transition. The energies of rovibrational levels in the C state, spanning a wide range of v (0 ⩽ v ⩽ 43) and J (12 ⩽ J ⩽ 100) quantum numbers, are fitted to a Dunham polynomial expansion and also to a numerical potential curve constructed by the inverted perturbation approach (IPA) method.
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