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用屏栅电离室测量了~(10)B(n,α)~7Li反应出射α粒子的角分布和总截面。实验结果表明:入射中子能量为4—6.5 MeV时,出射的α粒子角分布明显后倾,且后倾趋势随入射中子能量的增加而变大。
The angular distribution and total cross section of α particles emitted from ~ (10) B (n, α) ~ 7Li reaction were measured by using a gridded ionization chamber. Experimental results show that when the incident neutron energy is 4-6.5 MeV, the angle distribution of α particle is obviously backward, and the backward trend increases with the incident neutron energy.