CAJ | 학술논문

采用两套不同尺寸的贫化铀球装置开展了装置内部的238 U （n ，2n）反应率实验研究，利用PD‐300加速器D‐T中子源辐照实验装置，源强变化采用伴随粒子法监测，238 U圆片放置在实验装置的45°孔道内，分布在距中子源不同距离处，辐照结束后，采用 HPGe探测器测量238 U圆片活化γ射线。实验结果与蒙特卡罗程序模拟计算结果进行了比较和分析。结果表明，238 U （n ，2n）反应率实验结果与模拟计算值较吻合，238 U （n ，2n）反应率随球体半径 r的增加，近似服从e－ ar／r2分布规律。
채용량투불동척촌적빈화유구장치개전료장치내부적238 U （n ，2n）반응솔실험연구，이용PD‐300가속기D‐T중자원복조실험장치，원강변화채용반수입자법감측，238 U원편방치재실험장치적45°공도내，분포재거중자원불동거리처，복조결속후，채용 HPGe탐측기측량238 U원편활화γ사선。실험결과여몽특잡라정서모의계산결과진행료비교화분석。결과표명，238 U （n ，2n）반응솔실험결과여모의계산치교문합，238 U （n ，2n）반응솔수구체반경 r적증가，근사복종e－ ar／r2분포규률。
The 238 U (n ,2n) reaction rates of two depleted uranium spheres were meas‐ured .The depleted uranium spheres were irradiated by D‐T neutron at PD‐300 accelera‐tor .The intensity of neutron source was monitored by the associated‐alpha particles from the T (d ,n)He reaction .After radiation ,the activated gamma rays of uranium foils in the 45° hole of uranium spheres were measured using HPGe detector .The 238 U(n ,2n) reaction rates of two depleted uranium spheres were calculated using Monte‐Carlo simu‐lation .It shows that the 238 U(n ,2n) reaction rates from experiments are agreed with the calculations .The change of 238 U(n ,2n) reaction rate with the radius r of depleted urani‐um sphere is obeyed approximately the distribution of e - ar/r2 .