Nuclear Physics A ( IF 1.4 ) Pub Date : 2021-06-05 , DOI: 10.1016/j.nuclphysa.2021.122248 A.N. Vodin , O.S. Deiev , V.Yu. Korda , I.S. Timchenko , S.N. Olejnik , N.I. Aizatsky , A.S. Kachan , L.P. Korda , E.L. Kuplennikov , V.A. Kushnir , V.V. Mitrochenko , S.A. Perezhogin
The bremsstrahlung flux-averaged cross-sections for the photoneutron reactions 93Nb(γ,xn; x=1–5)(93-x)m,gNb were measured in the range of boundary energies of bremsstrahlung γ-quanta =33–93 MeV. The isomeric ratios of the average cross-sections of the products of the reactions 93Nb (γ,4n)89m,gNb and 93Nb(γ,5n)88m,gNb were determined in the energy ranges = 50–93 and 70–93 MeV, respectively. The experiments were carried out on the beam of the linear electron accelerator LUE-40 of the National Science Center Kharkov Institute of Physics and Technology using the method of induced activity. Calculations of the cross-sections, average cross-sections, and isomeric ratios of the reaction products were performed using the TALYS 1.9 code and the GEANT4.9.2 code. The experimental average cross-sections for the reactions (γ,n), (γ,2n), and (γ,4n) are in good agreement with theory, while in the case of reactions (γ,3n) and (γ,5n) some discrepancies are observed. The results obtained for the reactions (γ,n), (γ,3n), and (γ,4n) are in satisfactory agreement with the known literature data. The average cross sections for the reactions (γ,2n) and (γ,5n) and the isomeric ratios of the reaction products 93Nb(γ,5n)88m,gNb were measured for the first time.
中文翻译:
93 Nb 上的光中子反应在E γ max = 33–93 MeV
光中子反应93 Nb( γ ,xn; x=1–5) (93-x)m,g Nb 在轫致辐射γ -量子边界能范围内测得的轫致辐射通量平均截面=33–93 MeV。所述反应的产物的平均横截面的异构体比率93的Nb(γ,4N)89米,克Nb和93的Nb(γ,5N)88米,克铌被在能量范围确定= 50–93 和 70–93 MeV,分别。实验是在国家科学中心哈尔科夫物理技术研究所直线电子加速器LUE-40的光束上采用诱导活动的方法进行的。使用 TALYS 1.9 代码和 GEANT4.9.2 代码计算反应产物的横截面、平均横截面和异构体比率。反应 ( γ ,n)、( γ ,2n) 和 ( γ ,4n)的实验平均截面与理论非常吻合,而在反应 ( γ ,3n) 和 ( γ ,5n )的情况下) 观察到一些差异。反应 ( γ ,n), ( γ,3n) 和 ( γ ,4n) 与已知文献数据一致。用于反应(平均横截面γ,2N)和(γ,5N),将反应产物的异构体比93的Nb(γ,5N)88米,克铌进行首次测定的。