Laser spectroscopy of the C ~1Σ +-X ~1Σ ~+ transition of ScBr

摘要

The laser induced fluorescence spectrum of scandium monobromide (ScBr) between 795 and 845 nm has been recorded and analyzed. ScBr was produced by reacting laser vaporized Sc atoms with ethyl bromide (C _2H _5Br). Spectra of six vibrational bands of both Sc ~(79)Br and Sc ~(81)Br isotopomers of the C ~1Σ ~+-X ~1Σ ~+ transition were observed. A least-squares fit of the measured line positions yielded accurate molecular constants for the v = 0-3 levels of the C ~1Σ ~+ state and the v = 0-2 levels of the X ~1Σ ~+ state. The equilibrium bond length of the C ~1Σ ~+ state has been determined to be 2.4776.