Measuring σf^-9/σf^-5 With the Small Fission Ionization Chamber on БФС-101-1

The σf^-9/σf^-5 is measured with the small fission ionization chamber which are coated with high-enriched ^235U （enrichment 90%） and ^239pu （enrichment 99.5%） on the core zero power experimental facility of Russia namely БФС-101-1 .     

在БФС-101-1(钚堆芯)上用小型裂变室测量轴向和径向平均裂变截面比■

本工作是在БФС-101-1(钚堆芯)临界装置上采用带富集铀(235U的富集度为90%)和钚(239Pu富集度为99.5%)涂层的小型裂变室方法测量平均裂变截面比?σf9/?σf5。进行轴向平均裂变截面比?σf9/?σf5测量时,在堆芯中心(其位置坐标为(0,0,0))燃料组件位置处把组件替换为实验导管。小