par Nicolis, Grégoire ;Rice, Stuart ;Jortner, Joshua
Référence The Journal of Chemical Physics, 48, 8, page (3544-3551)
Publication Publié, 1968
Article révisé par les pairs
Résumé : This paper reports a study of the normal modes of simple disordered systems using a dispersion oscillator model with dipolar coupling for the unperturbed electronic states. An equation is derived for the normalmode frequencies and for the excitation amplitudes of the system. This equation displays the local structure of the fluid in an explicit way. The nature of the resonance and localized impurity modes is discussed in the particular case of an isotopically disordered uniform system. Finally, the contribution of the thermal motion of the atoms to the damping of the normal modes is discussed. The significance of the results and the relationship to other formal studies of disordered systems is briefly considered.