The flux-averaged cross-sections \(\langle {\sigma (E_{\gamma \mathrm{max}})}\rangle \) for the \(^{181}\mathrm{Ta}(\gamma ,\textit{x}n; \textit{x} = 1\)–\(8)^{181-\textit{x}}\mathrm{Ta}\) reactions have been measured at the end-point bremsstrahlung energies of 80–95 MeV. The experiments were performed by using the beam from the NSC KIPT electron linear accelerator LUE-40 and measuring the residual \(\gamma \)-ray activities of the reaction products. The theoretical \(\langle {\sigma (E_{\gamma \mathrm{max}})}\rangle \) values were computed using the mono-energetic cross-sections \(\sigma (E)\) from TALYS1.9 code. A comparison between the measured average cross-sections and the theoretical values show good agreement for the \((\gamma ,1\)–\(6\mathrm{n})\) reactions but substantial differences for the \((\gamma ,7\mathrm{n})\) and \((\gamma ,8\mathrm{n})\) reactions. Isomeric average cross-section ratios \(d(E_{\gamma \mathrm{max}})\) of a product \(^{178g,m}\mathrm{Ta}\) produced from the \(^{181}\mathrm{Ta}(\gamma ,3\mathrm{n})\) reaction have been obtained. The results have been compared with the literature data and the theoretical values based on TALYS1.9 code.

通量平均横截面\（\ langle {\西格玛（E _ {\伽马\ mathrm {MAX}}）} \ rangle \）的\（^ {181} \ mathrm {的Ta}（\γ，\ textit {x}n; \textit{x} = 1\) – \(8)^{181-\textit{x}}\mathrm{Ta}\)反应在端点轫致辐射能量为 80– 95 兆电子伏。实验是通过使用来自 NSC KIPT 电子直线加速器 LUE-40 的光束并测量反应产物的残余\(\gamma \)射线活度来进行的。理论\(\langle {\sigma (E_{\gamma \mathrm{max}})}\rangle \)值是使用单能截面\(\sigma (E)\)来自 TALYS1.9 代码。测量的平均横截面与理论值之间的比较表明\((\gamma ,1\) – \(6\mathrm{n})\)反应非常一致，但\((\gamma ,7\mathrm{n})\)和\((\gamma ,8\mathrm{n})\)反应。由\(^{181}产生的产物\(^{178g,m}\mathrm{Ta}\) 的异构平均横截面比\(d(E_{\gamma \mathrm{max}})\) \mathrm{Ta}(\gamma ,3\mathrm{n})\)反应已经得到。结果与文献数据和基于TALYS1.9代码的理论值进行了对比。