Abstract
The high resolution infrared emission spectrum of lithium iodide has been recorded with a Fourier transform spectrometer. A total of 1024 transmissions with Δ v = 1 for 7 LiI (from v = 1 → 0 to v = 8 → 7), 387 transitions with Δ v = 2(v = 2 → 0 to v = 6 → 4) and 504 transitions with Δ v = 1 for 6 LiI (v = 1 → 0 to v = 5 → 4) have been assigned. The infrared data have been used to determine improved mass-dependent Dunham Y lm coefficients for the ground X1 Σ+ electronic state. The mass-independent Dunham U lm coefficients were obtained along with Born-Oppenheimer breakdown constants. Finally, all of the data were fitted to the eigenvalues of the radial Schrodinger equation containing a modified Morse potential function to determine the parameters of an effective ground state potential.)
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