完成了医院中子照射器（IHNI）瞬发γ中子活化分析(PGNAA)系统的初步设计，并按照设计完成系统搭建。该系统探测器屏蔽部分和中子束屏蔽部分内层均为天然LiF粉末，外层为铅屏蔽层。使用该系统进行的硼浓度测量实验结果表明，该系统可测量¹⁰B浓度为10 ppm(1 ppm=10^-6)，体积为2 mL的样品，¹⁰B元素测量灵敏度为0.822 cps(s^-1)/ppm。同时发现天然LiF粉末会在待测能区产生较高本底，影响测量精度。

The preliminary design of PGNAA system of IHNI was completed and the system in accordance with the design was set up. For both detector shielding part and the neutron beam shielding part, the inner layer was natural LiF powder and the outer was lead.Then boron concentration measurement experiments using this system were finished.The results show that the the system can measure ¹⁰B concentration of 10 ppm, with 2 mL of the sample volume. ¹⁰B element measurement sensitivity was 0.822 cps/ppm. Also it was found that the natural LiF powder would produce a high background in the target part of the energy spectrum and affect the measurement accuracy.