The pure rotational absorption spectrum of gaseous hydrogen bromide,
PHYSICS · Subjective · Fermi University Physics · Atomic, Molecular & Optical Physics · Molecular structure and spectra · Molecular structure and spectra
Reading the Spectrum, Ch Two nuclei on one curve: rotation, vibration and the spectrum of a diatomic molecule
Problem
The pure rotational absorption spectrum of gaseous hydrogen bromide, H79Br, is measured in the far infrared. Its rotational constant is B0=8.465cm−1. Using the rigid-rotor selection rule ΔJ=+1, predict the wavenumbers of the first four lines of the absorption spectrum, starting from J=0, and state the spacing between successive lines.