2020同步年報

T he neutron technique aims to answer various scientific questions about the fundamental properties of mate- rials on an atomic scale, as well as medical applications on a nanometre scale. Researchers use neutron instruments to count scattered neutrons, measure their energies and the angles at which they scatter, and map their final position. In contrast to X-rays and electrons, which interact with the electrons around the atomic nuclei, the neutron interacts with those nuclei. As the neutrons are neutral, they are de- flected only when they strike a core. This capability allows scientists to glean details about the nature of materials ranging from single crystals to thermally isolating materials, from proteins to drug systems, from metals to magnets. Our user communities performed the following remarkable studies; they completed their outstanding research at ANSTO using neutron instruments in 2020. Five reports include the highlights from high-performance non-linear optical mate- rials reported by Chin-Wei Wang. Two highlights from the SIKA instrument show the first inelastic neutron-scattering study for a SrRuO 3 thin film capable of SIKA and the pho- non behaviour of high- zT Sb-doped GeTe thermoelectric materials reported by Chun-Ming Wu and Shin-ichiro Yano, respectively. A SANS study as a new strategy to combat LPS-de fi cient Gram-negative pathogens with nano-technology is reported by Xiangfeng Lai. Research using a neutron powder diffractometer for a magnetic frustration mate- rial, Mn 1.5 Cr 1.5 O 4 , is described by Chin-Wei Wang. The last texture study for advanced metallurgy reported by E-Wen Huang is based on experiments at the Spallation Neutron Source facility in Oak Ridge National Laboratory. (by Shih- Chun Chung) Neutron Science