Testing of time-of-flight neutron diffraction imaging using a high-resolution scintillator detector with wavelength-shifting fibers

摘要

In this study, time-of-flight (TOF) neutron diffraction images of a beta-Sn single crystal and a coarse-grained polycrystalline steel plate were obtained using a high-resolution wavelength-shifting fiber based scintillator detector. An inhomogeneous intensity distribution of the 200 reflection from the beta-Sn single crystal indicated a large defect density near the surface of the crystal. In addition, the diffraction spots from the individual grains of the steel plate were successfully observed separately in both the normal and width directions. This imaging technique has the potential to be used for evaluating the distribution of material characteristics in different regions inside bulk materials.