【摘要】 <正> 一、引言热中子散射是研究凝聚态物质(包括固体和液体)的强有力的工具之一。足够的强度和良好的分辨率是做好中子散射实验的两大前提。一台中子谱仪分辨率的高低,与单色器、准直器、中子波长和几何条件等多种因素有关,而采取切实有效的措施去尽量减小实验本更多还原

【Abstract】 A thermal neutron filter of Si single crystal was designed and installed onBe-filter detector neutron spectrometer. Under the condition of transmission forthermal neutrons being 70-80%, the ratio of signal to background of inelasticincoherent thermal neutron scattering could raise about 2 times in the region ofmedium energy measured.更多还原