Measurement of flux-weighted average cross-section in the photo-neutron reactions of Nb at the bremsstrahlung end-point energies of 20 MeV and 67 MeV

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-10-30 DOI:10.1016/j.nimb.2024.165557

R.V. Avetisyan, A.G. Barseghyan, Yu A. Gharibyan, A.V. Gyurjinyan, H.A. Mkrtchyan, A. Yu Petrosyan, I.A. Kerobyan

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Abstract

The photo-neutron flux-weighted average cross-sections for ⁹³Nb(γ,xn) reactions at the bremsstrahlung end-point energies of 20 MeV and 67 MeV have been measured by the activation technique using the electron linear accelerator LUE-75 located at the A.I. Alikhanyan National Science Laboratory (AANL). Furthermore, the isomeric cross-section ratio has been determined for the ^89m,gNb isomeric pair. TALYS 1.96 and EMPIRE 3.2 nuclear codes were used to calculate the ⁹³Nb(γ,xn) reaction cross-sections and isomeric ratio as functions of bremsstrahlung end-point energy. The energy distribution of bremsstrahlung photons has been calculated by GEANT4. The measured experimental data has been compared with currently available literature data as well as with the values based on theoretical calculations.

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在轫致辐射端点能量为 20 MeV 和 67 MeV 时测量铌的光中子反应中的通量加权平均截面

利用位于阿利哈扬国家科学实验室（A.I. Alikhanyan National Science Laboratory，AANL）的电子直线加速器 LUE-75，通过活化技术测量了轫致辐射端点能量为 20 MeV 和 67 MeV 的 93Nb(γ,xn)反应的光-中子通量加权平均截面。此外，还测定了 89m,gNb 异构体对的异构体截面比。使用 TALYS 1.96 和 EMPIRE 3.2 核代码计算了 93Nb(γ,xn)反应截面和异构体比，作为轫致辐射端点能量的函数。轫致辐射光子的能量分布由 GEANT4 计算得出。已将测得的实验数据与现有文献数据以及理论计算值进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.