Abstract
We report new high resolution measurements on the photoabsorption spectra of BaH in the wavelength region 3,000 Å–3,800 Å 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 asK 2 ∑-X 2 ∑ at 3,725 Å andL 2 Π —X 2 ∑ at 3,694 Å, which are forming an p-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.
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On leave from the Department of Physics, University of Karachi, Karachi-32, Pakistan
The financial assistance of Pakistan Science Foundation under research grant S-KU-PHY (23) in carrying out the experimental work at the University of Karachi is acknowledged with thanks.
Part of the analysis was done at International Centre for Theoretical Physics, Trieste (Italy) on the visit of M. Rafi as an Associate member and at Physikalisches Institut der Universität Bonn in Summer 1983, these visits are gratefully acknowledged.
We are thankful to Dr. J.P. Connerade at Imperial College, London for his useful comments to improve the presentation and Prof. G. Noeldeke at Physikalisches Institut for his support and encouragement.
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Rafi, M., Ahmed, S., Khan, M.A. et al. On thep-complex spectra of the BaH molecule. Z Physik A 320, 369–373 (1985). https://doi.org/10.1007/BF01415712
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DOI: https://doi.org/10.1007/BF01415712