No abstract

The B 2Σ-X 2Σ 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 the B 2Σ and X 2Σ states have been determined by standard least-squares analysis. The following molecular constants have been derived (cm-1): T e ωe ωe x e ωe y e B e αe 104 × D e B 2Σ+ 11092.593 1088.898 15.471 0.0237 3.26879 0.07061 1.1585 X 2Σ+ 0. 1168.433 14.611 0.0276 3.38226 0.06568 1.1234

Twenty-five bands of the First Negative System, B 2Σu+ - X 2Σg+, of the Nitrogen Molecule Ion N2+ have been analysed or reanalysed. The previous analysis of the (7, 10) band is found to be incorrect. Molecular constants for the X 2Σg+, A 2Πu, B 2Σu+ and C 2Σu+ states obtained with the term value approach from seventy-one bands are presented.

The absorption spectrum of CaH in the region 6 130-7 125 Å has been generated using a King furnace. The spectrum was recorded photographically in a 10.685 m concave grating spectrograph. Ten bands belonging to the A 2Π-X 2Σ and B 2Σ-X 2Σ systems have been rotationally analyzed. Perturbations between the two excited states have been observed. Computer methods have been used to calculate term values and to evaluate molecular constants.

Laser spectroscopic investigations of CaCl. I. Rotational analysis of t h eA2n-X2z transition.