In this article we review our recent studies on polymer structure and dynamics using neutron scattering techniques, including three topics, (i) glassy dynamics of polymer thin films, (ii) polymer crystallization under flow and (iii) nanometer scale dynamics of poly (vinyl alcohol) gels by neutron spin-echo measurements.
Comprehensive study by neutron scattering technique in a weakly coupled quantum dimers and classical chains compound Cu2Fe2Ge4O13is reported. Thorough survey of the spin dynamics in four dimensional k-E space by triple axis spectrometer reveals that the dimer behaves as a media that transfers exchange integrals from one Fe spin to another. The obtained effective parameter of the indirect magnetic interaction is totally consistent with that estimated by static measurements including neutron diffraction and magnetic susceptibility measurement.
A pulsed cold neutron beam for the study of neutron optics and fundamental physics (NOP) is under construction as the BL05 of the spallation neutron source of the J-PARC. The NOP beamline has three beam branches, which provide the highly-polarized beam, high intensity beam and low divergence beam for the neutron decay experiment, the neutron scattering experiment and the neutron interferometry experiment, respectively. We overview the physics to be studied at the NOP beamline at its beginning stage.