Dynamic structure factor of non-crystalline and crystalline systems as revealed by MARI, a neutron chopper instrument

摘要

Here we extracted information on the structure and dynamics of material from the momentum dependence of the dynamic structure factor S(Q,E), which is a function of momentum transfer Q and energy transfer E, and introduced a new concept called the dynamic pair correlation function (DPCF). We used the MARI (Multi-Angle Rotor Instu- ment) spectrometer, which uses neutron incident energies from 20 meV to 2 eV with high energy resolution ～1/100 (ΔE/E_i) combined with a pulsed neutron source.