Phonon dynamics of NaI investigated by G(r,E) analysis

Abstract

The phonon dynamics of NaI is investigated from the dynamical structure function in real-space G(r,E) transformed from the S(Q,E) measured by inelastic neutron scattering measurement. In this study we used the incident energies of 36.9 and 81.3 meV which cannot yield very large maximum momentum transfer Qmax. Our analyses have shown that the inelastic neutron scattering measurement under the conventional condition Qmax∼ 5 Å−1 can provide us a meaningful information on the phonon dynamics at around the first nearest neighbor distance of Na-I through the G(r,E) analysis on accepting the worse real-space resolution.