Excitation functions for ²⁰⁹Bi(α,2n)²¹¹At, ²⁰⁹Bi(α,3n)²¹⁰At and ²⁰⁹Bi(α,4n)²⁰⁹At reactions were calculated using TALYS-1.95 nuclear code from threshold to 50 MeV by invoking suitable options for level densities, nucleon-nucleus optical model potentials and alpha optical model potentials. Statistical factors were used to verify the quality of matching between theoretical model calculations and the experimental data from the EXFOR database. The TTY of ²¹¹At calculated using the excitation function of ²⁰⁹Bi(a,2n)²¹¹At reaction is compared with existing experimental studies from literature The results of the present study are important for the validation of nuclear model approaches with increased predictive power for ²⁰⁹Bi(α,xn) reactions for the production of ²¹¹At.

²⁰⁹ Bi(α,2n) ²¹¹ At, ²⁰⁹ Bi(α,3n) ²¹⁰ At 和²⁰⁹ Bi(α,4n) ²⁰⁹ At 反应的激发函数是使用 TALYS-1.95 核代码计算的，从阈值到 50 MeV，通过调用合适的选项对于能级密度、核子-核光学模型势和 alpha 光学模型势。使用统计因素来验证理论模型计算与 EXFOR 数据库中的实验数据之间的匹配质量。²¹¹ At的 TTY使用²⁰⁹ Bi(a,2n) ²¹¹的激励函数计算At 反应与文献中的现有实验研究进行比较 本研究的结果对于验证核模型方法很重要，该方法具有更高的预测能力，可用于生产²¹¹ At 的²⁰⁹ Bi(α,xn) 反应。