The inner-shell photoabsorption spectrum of gas-phase HBr below the Br-3d ionization thresholds was measured with high spectral resolution. Ligand-field splitting of the Br-3d levels could be clearly resolved in photoabsorption, in agreement with observations made in recent photoemission work. The good signal-to-noise ratio of the present photoabsorption spectrum allowed to follow the ligand-field splitting of 3d-core-excited np Rydberg states up to high quantum numbers (n=9), and to assign some additional weak transitions that could not be resolved before.
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Püttner et al. (1995) studied this question.
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