Abstract

The CS radical was generated by discharging the mixture gas of CS2 and Helium. The Doppler limited spectra of CS were recorded in the region of 12350–12950 cm−1 using optical heterodyne concentration modulation absorption spectroscopy. Three hundred and twenty-six lines were recorded and assigned to the d3Δ-a3Π (8,1) band, in which eighty-three transitions were first observed. A set of improved molecular constants for the d3Δ(v=8) and a3Π(v=1) levels were determined by a non-linear least-squares fitting of all the lines to the effective Hamiltonian.

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