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以27Al(n,α)24Na反应截面作为标准反应截面,测量了产物核174mLu,174gLu,得到中子能量为13.4～14.6MeV的镥(n,2n)反应截面,样品置于距离D-T中子源10cm圆环表面的不同位置处,利用伴随α粒子法进行中子源强监测。样品辐照采用了K-400中子发生器,辐照时间为30h,入射中子能量利用铌锆截面比法测定,利用GEM60P型高纯锗探测器测量活化样品,高纯锗探测器的探测效率采用标准γ源进行了刻度。通过测量174Lu的992.13keV和1241.76keV两条γ峰得到反应截面,175Lu(n,2n)反应截面为1973～2116mb,结果的相对不确定度约为3.5%,实验数据与其他实验室测量结果和评价数据进行了比较。
Taking the 27Al (n, α) 24Na reaction cross section as the standard cross section, the product nuclei were measured at 174mLu and 174gLu, respectively. The 镥 (n, 2n) reaction cross section with neutron energy of 13.4 ~ 14.6MeV was obtained. 10cm ring surface at different locations, with the use of the alpha particle source method for monitoring the strength of the neutron source. K-400 neutron generator was used for irradiation. The irradiation time was 30h. The incident neutron energy was measured by the method of niobium-zirconium cross section. The activated sample and the detector of high-purity germanium detector were measured by GEM60P high-purity germanium detector Efficiency is calibrated using a standard gamma source. The reaction cross section was obtained by measuring the two γ peaks of 992.13 keV and 1241.76 keV for 174Lu. The reaction cross section of 175Lu (n, 2n) was from 1973 to 2116mb, and the relative uncertainty was about 3.5%. The experimental data were compared with other laboratory measurements and Evaluation data were compared.