SUB-DOPPLER ABSORPTION SPECTRUM OF LiH :

THE A-X SYSTEM.

N. Bouloufa, P. Cacciani, R. Vetter and A. Yiannopoulou

Laboratoire Aimé Cotton, C.N.R.S. II, Bât.505, 91405 Orsay cedex, France

The A1S+-X1S+ sub-Doppler absorption spectrum is recorded by crossing an effusive beam of LiH by a cw tunable laser beam in the near UV and by collecting the laser-induced fluorescence versus the laser frequency. 384 lines are measured between 357 nm and 385 nm and assigned to 6LiH and 7LiH with an accuracy of 5 10-3 cm-1 (lists below).
Accurate Dunham coefficients and mass-dependent corrections are deduced for the A1S+ state of both isotopomers by the combination of previously-published data [1-3] and these new ones [4].

[1] W.C.Stwalley and W.T.Zemke, J. Phys. Chem., Ref. Data, 22, 87 (1993)
[2] A.G.Maki, W.B.Olson, and G.Thompson, J. Mol. Spectrosc. 144, 257 (1990)
[3] M.Dulick, K.Q.Zhang, B.Guo, and P.F.Bernath, J. Mol. Spectrosc. 188, 14 (1998)
[4] N.Bouloufa, P.Cacciani, R.Vetter, and A.Yiannopoulou, J. Mol. Spectrosc. 202, 37 (2000)

Lines wavenumbers assigned to 7LiH and 6LiH

Dunham and Correction-Mass Coefficients for the A State