Energy Spectra of Some Molecules

Abstract

Section III.1 discusses how the energy levels of a quantum-mechanical system emitting dipole radiation are observed. A derivation of the transition probability is not given. In Section III.2 the defining relations of angular momentum are established. Section III.3 derives the representations of the algebra of angular momentum. In Section III.4 the energy spectrum of a rotator is derived and compared with the experimental spectrum of diatomic molecules. Section III.5 contains the basic assumption about the physical combination of two nonidentical quantum-mechanical systems and the application of this assumption to the description of vibrating and rotating diatomic molecules.