Abstract
The ν 1 , ν 1 + ν 2 1, and ν 1 + 2ν 2 0 rovibrational spectra of 8 4 Kr:H 7 9 Br and 8 4 Kr:H 8 1 Br are reported using highfrequency wavelength modulation near-infrared diode-laser continuous-wave (cw) supersonic-jet spectroscopy. This information has been combined with previously recorded results from a ground-state microwave analysis and used to determine a scaled and shifted morphed potential that is based on the transformation of an ab initio potential in a nonlinear least-squares fit to the available experimental data. The morphed potential is consistent with a collinear Kr-BrH global minimum structure with R c m = 3.88 A that is 23 ′ 3 cm - 1 more stable than the minimum associated with the collinear Kr-HBr isomeric form, which has R c m = 4.27 A. Thus, the Kr:HBr system has a ground-vibrational-state isomeric structure that differs from the global minimum energy structure, a result that is similar to that found in the Ar:HBr dimer.
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