Ch 126. Molecular Spectra and Molecular Structure. 9 units (3-0-6); third term. Prerequisites: Ch 21 and Ch 125 a/Ph 125 a or instructor's permission. Quantum mechanical foundations of the spectroscopy of molecules. Topics include quantum theory of angular momentum, rovibrational Hamiltonian for polyatomic molecules, molecular symmetry and permutation-inversion groups, electronic spectroscopy, interaction of radiation and matter. Instructor: Blake.