Rotationally inelastic scattering of OH (2Π3/2, v=0, J=3/2, f) by HBr (1Σ, v=0, J<4).

Relative state-to-state cross sections of OH molecules in the ²Π_3/2, v=0, J=3/2, M_J=3/2, f state have been determined for transitions up to ²Π_3/2, v=0, J=11/2, f and ²Π_1/2, v=0, J=7/2, e states by collisions with HBr molecules (¹Σ, v=0, J<4) at 750 cm^-1 collision energy. In order to investigate features of the anisotropy of the OH–HBr potential energy surface, the steric asymmetries, which account for the effect of the OH orientation with respect to the collision partner, have been measured. A comparison with other systems previously studied shows strong similarities with the OH–HCl system. [ABSTRACT FROM AUTHOR]