Diatomic Molecules

Abstract

The systematics of electron quantum states in diatomic molecules is briefly reviewed along with the systematics of molecular terms. The normal electronic configurations of molecular species and asymptotic parameters of valence electron wavefunctions are presented. Numerical data are compiled for spectroscopic constants, dissociation energies, ionization potentials and radiative lifetimes of electronically excited diatomic molecules. The potential energy curves of some diatomic molecules are reproduced and the diagrams of ir-spectra for one- and two-quantum vibrational transitions in a few diatomic molecules are supplied with the calculated values of Einstein coefficients for spontaneous emission from vibrationally excited states.