On thep-complex spectra of the BaH molecule

Abstract

We report new high resolution measurements on the photoabsorption spectra of BaH in the wavelength region 3,000/~-3,800A using the second order of a 3.4 metre Ebert spectrograph and a High pressure xenon arc as the background source of continuum. Observations include two new electronic transitions of BaH and BaD, denoted as K2S-X22; at 3,725A and L2FI-X22; at 3,694A, which are forming a np-complex orginating from the 7p atomic state of barium. A rotational analysis of the band systems have been carried out and effective rotational constants are determined.

High-resolution studies of BaD molecule in the ultraviolet region

“…This interpretation confirms the assignment suggested by Veseth [13]. In our previous paper [5] we have reported two new band systems of BaH and assigned them as K2~-X22 and L~II-X2Z transitions, originating from the 7p atomic state of Ba atom. These studies were made in absorption, covering the spectral region from 3600/~ to 3800/~, and the newly observed band systems were rotationally analysed.…”

“…The visual intensity distribution shows that the strongest branch is the Q-branch, whereas the weakest branch is the R-branch as was observed in the case of BaH bands [5].…”

“…Ten band systems have been investigated in the BaH spectrum and assigned as the transition between the ground state X22 and the excited states A2II, B22, C22, D22, E2II, FeZ and A'2A (see [2] and references therein), whereas the I2Z [4], K22 and L2// [5] systems were reported in our previous papers. Detailed investigations of the observed band systems for BaD molecule were reported by Kopp et al [6] which covered the spectral region (6100 -7300)/~ using an eleven meter concave grating spectrograph in conjunction with a King-type furnace.…”