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用屏栅电离室对 3.6 7MeV与 4 .4 2MeV中子6Li(n ,t) 4He反应微分截面进行了测量。利用氘气体靶通过D(d ,n) 3 He反应产生中子 ,用BF3 和液闪探测器 (NE2 13)进行相对中子通量监测 ,绝对中子通量用2 3 8U(n ,f)与H(n ,p)反应来刻度。测量结果表明 ,氚的质心系微分截面在中子能量为 3.6 7MeV时很接近 90°对称 ,而到 4 .4 2MeV时则明显前倾
Differential cross-sections of 3.6 7MeV and 4 .4 2MeV neutron 6Li (n, t) 4He reactions were measured using a gridded ionization chamber. Neutrons were generated by the D (d, n) 3 He reaction using deuterium gas targets, and relative neutron flux was monitored by BF3 and a liquid scintillation detector (NE2 13). The absolute neutron flux was expressed as 2 3 8 U (n, f ) And H (n, p) reaction scale. The measurement results show that the differential cross section of the center of mass of tritium is very close to 90 ° symmetry when the neutron energy is 3.6 7 MeV, and is obviously lean forward to 4.224 MeV