High-resolution studies of BaD molecule in the ultraviolet region

Summary

We report a new high-resolution absorption spectrum of BaD in the wavelength region (3580÷3760) Å using the third order of a 21 ft. concave grating spectrograph. Two new electronic states of BaD are reported named asK ²∃-X ² ∃ at 3750 Å andL ² II-X ² ∃ at 3680 Å, respectively. The (0,0),(1,1),(1,0) and (2,1) bands of theL ²-II-X ²∃ state and (0,0) and (1,0) bands of theK ²∃-X ²∃ state have been observed. Vibrational and rotational analysis of these newly observed bands have been carried out and the corresponding effective vibrational and rotational constants are reported. TheK ²∃ andL ² II states are tentatively assigned as originating from the 7p atomic state of barium.