Measurement of the 169Tm(γ,n) cross section with quasi-monoenergetic γ rays at the Shanghai Laser Electron Gamma Source
Measurement of the 169Tm(γ,n) cross section with quasi-monoenergetic γ rays at the Shanghai Laser Electron Gamma Source
Dexin wang 1Su-Ya-La-Tu Zhang 1Zi-Rui Hao 2Gong-Tao Fan 2Hong-Wei Wang2
作者信息
- 1. Institute of Nuclear Physics, College of Physics and Electronic Information, Inner Mongolia Minzu University, Tongliao 028000, Inner Mongolia, China.
- 2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- 折叠
摘要
使用激光康普顿散射产生的准单色γ射线在上海激光电子伽马源（SLEGS）测量了γ-Tm（γ，n）反应的光中子截面。使用迭代展开方法获得了8.27至14.61 MeV能量范围内的单能截面。将测量的激发函数与IAEA-2019评估、NewSUBARU数据以及TENDL-2019和TENDL-2021库进行了比较。虽然再现了横截面的总体趋势，但在共振区域仍存在明显差异。根据实验结果，提取了$^{169}$Tm的$\gamma$射线强度函数，并将其与TALYS计算结果进行了比较。使用实验约束的强度函数，进一步得到了逆$^{168}$Tm（$n，\gamma$）$^{169}$Tm反应截面计算，为核反应模型和评估的核数据库提供有用的约束。
Abstract
The photoneutron cross section of the $^{169}$Tm($\gamma$,n)$^{168}$Tm reaction was measured at the Shanghai Laser Electron Gamma Source (SLEGS) using quasi-monochromatic $\gamma$ rays produced via laser Compton scattering. Monoenergetic cross sections were obtained in the energy range from 8.27 to 14.61 MeV using an iterative unfolding method.The measured excitation function was compared with the IAEA-2019 evaluation, NewSUBARU data, and the TENDL-2019 and TENDL-2021 libraries. While the general trend of the cross section is reproduced, noticeable differences remain in the resonance region. Based on the experimental results, the $\gamma$-ray strength function of $^{169}$Tm was extracted and compared with TALYS calculations.Using the experimentally constrained strength function, the inverse $^{168}$Tm($n,\gamma$)$^{169}$Tm reaction cross section was furthercalculated, providing useful constraints for nuclear reaction models and evaluated nuclear data libraries.关键词
光子核反应/光子中子截面/激光康普顿散射/SLEGSKey words
Photonuclear reaction/Photoneutron cross section/Laser Compton scattering/SLEGS引用本文复制引用
Dexin wang,Su-Ya-La-Tu Zhang,Zi-Rui Hao,Gong-Tao Fan,Hong-Wei Wang.Measurement of the 169Tm(γ,n) cross section with quasi-monoenergetic γ rays at the Shanghai Laser Electron Gamma Source[EB/OL].(2026-03-09)[2026-03-13].https://chinaxiv.org/abs/202603.00049.学科分类
原子能技术基础理论
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