Fourier Transform Spectroscopy of the B2Σ-X2Σ Transition of BaH

Abstract
TheB2Σ-X2Σ band system of gaseous barium hydride in the wave length region 8900-11200 Å has been examined in absorption using a King furnace. The spectrum has been obtained by means of Fourier transform spectroscopy. Seven bands have been rotationally analyzed. Term values and molecular constants of theB2Σ andX2Σ states have been determined by standard least-squares analysis. The following molecular constants have been derived (cm-1): Te ωe ωexe ωeye Be αe 104×De B2Σ+ 11092.593 1088.898 15.471 0.0237 3.26879 0.07061 1.1585 X2Σ+ 0. 1168.433 14.611 0.0276 3.38226 0.06568 1.1234