Dynamical Properties of NO Impurity Molecules in Alkali Halides. II. Vibrational Spectra

Abstract

Abstract The first‐order Raman scattering induced by the NO molecule in KI and RbCl is measured. The spectral features are compared with those observed in the ultraviolet and infrared spectra. The spectral properties are interpreted within the models which take into account the librational motion of the molecule. The force constants connecting the molecule with its neighbours are found to possess high anisotropy. The main spectral features are explained as the result of the modification of the local densities of states and as the manifestations of librational motion.