THE NU(1) BAND OF HOBR

The nu(1) band of HOBr centered at 3614.903 cm(-1) has been observed at 0.006 cm(-1) resolution. The band is a hybrid type with \(partial derivative mu(b)/partial derivative Q(1))/(partial derivative mu(a)/partial derivative Q(l))\ approximate to 0.84. The spectra of both bromine isotopes have been simultaneously fitted with a single calculation which includes all the previously reported rotational transitions. There appear to be no strong local perturbations to complicate the fitting of the line positions. Precise parameters are reported for the upper states as well as improved parameters for the ground states of both species. There is a prominent Herman-Wallis effect for the b-type transitions, which is well described by linear and quadratic terms in K-a. The equilibrium structure has been calculated. (C) 1995 Academic Press, Inc.