Nuclear Physics Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt.
Nuclear Physics Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt; Nuclear Physics Department (Cyclotron Facility), Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt.
Appl Radiat Isot. 2022 Sep;187:110341. doi: 10.1016/j.apradiso.2022.110341. Epub 2022 Jun 26.
Neutron induced reactions with different target materials and isotopes are very important for completion of nuclear data base as well as for many applications. Since the experimental determinations of the reaction cross sections for such reactions are not always available, attempts were made to introduce empirical or semi empirical formulae. In this work, new empirical formulation for (n, 2n) nuclear reactions on natural isotopes for neutron energies range 8-20 MeV, based on some published experimental works. The deuced formulae are then used to calculate the excitation functions for the (n,2n) on target isotopes having atomic numbers in the range 21-79. The cross section values for many reactions, having previously measured values, are determined and inter-comparison with the experimental and the TENDL-2019 database values are given using some statistical error parameters. Special attention was made to some Lanthanide isotopes. The results showed satisfied predictions in most cases.
利用不同的靶材料和同位素进行中子诱导反应对于完成核数据库以及许多应用都非常重要。由于并非总是可以进行此类反应的反应截面的实验测定，因此尝试引入经验或半经验公式。在这项工作中，根据一些已发表的实验工作，针对中子能量范围为 8-20 MeV 的天然同位素的 (n,2n) 核反应，提出了新的经验公式。然后，使用这些公式来计算原子数在 21-79 范围内的靶同位素的 (n,2n) 的激发函数。对于许多具有先前测量值的反应，确定了其截面值，并使用一些统计误差参数与实验和 TENDL-2019 数据库值进行了比较。特别注意了一些镧系元素同位素。结果表明，在大多数情况下都得到了令人满意的预测。
