４．１３中子单晶四圆衍射仪设备改建程玉芬，成之绪，郭立平中子单晶四圆衍射仪是１９８２年由我院和科学院物理所共同合作建造的，安装在重水反应堆旁。经过几年的运行发现，在样品位置的注量率较低，单色器不合适，单色中子波长较长（λ＝１．７×１０￣（－８）ｃｍ）... 4.13 neutron single crystal four circular diffractometer equipment reconstruction Cheng Yufen, Cheng Zhi, Guo Liping neutron single crystal four circle diffractometer was built in 1982 by our institute and academy of physics co-operation, installed in the heavy water reactor. After several years of operation, it was found that the fluence at the sample location was lower, the monochromator was not suitable, and the monochromatic neutron wavelength was longer (λ = 1.7 × 10 ~ (-8) cm).