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在浦项中子装置(PNF)的100 Me V电子直线加速器上利用透射法和飞行时间法测量了209Bi的0.1～100 e V的中子全截面。文中对于实验装置特点、用吸收片法拟合本底、拟合中子飞行距离和时间零点的处理过程做了较为详细的描述。测量结果与以前发表的实验数据以及评价数据ENDF/B-VII.1做了比较,比较结果符合得较好。
The full-scale neutron cross section of 209Bi at 0.1-100 eV was measured by the transmission method and the time-of-flight method on a 100 MeV electron linear accelerator (PoF) neutron device (PNF). In this paper, the characteristics of the experimental device, using the absorption plate method to fit the background, to fit the neutron flight and time zero point of the process of doing a more detailed description. The results of the measurements are compared with the previously published experimental data and evaluation data ENDF / B-VII.1 and the results are in good agreement.