The day-one experiment at SLEGS: systematic measurement of the (γ, 1n) cross sections on ¹⁹⁷Au and ¹⁵⁹Tb for resolving existing data discrepancies.

IF 21.1 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Bulletin Pub Date : 2025-06-06 DOI:10.1016/j.scib.2025.05.037

Zirui Hao, Gongtao Fan, Hongwei Wang, Longxiang Liu, Hanghua Xu, Yue Zhang, Yuxuan Yang, Sheng Jin, Kaijie Chen, Zhicai Li, Pu Jiao, Qiankun Sun, Mengdie Zhou, Shan Ye, Zhenwei Wang, Wenqing Shen, Yugang Ma

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引用次数: 0

Abstract

The Shanghai Laser Electron Gamma Source (SLEGS), built in the Shanghai Synchrotron Radiation Facility, is the first versatile laser Compton slant-scattering beamline in the world. The measurements of ¹⁹⁷Au(γ, 1n) and ¹⁵⁹Tb(γ, 1n) reaction cross sections were chosen as the day-one experiment at SLEGS. The SLEGS data are compared with data from the Livermore and Saclay positron annihilation in-flight facilities and with data from the NewSUBARU laser Compton backscattering facility. Our data evidence discrepancies with the results from Livermore and Saclay, while demonstrating consistency with the data from NewSUBARU. This is also consistent with new theoretical predictions. The new measurement lays the foundation for resolving the long-standing discrepancies between the Livermore and Saclay photoneutron cross section data for 19 nuclei in the future. Gamma-ray beams produced at SLEGS await a variety of experiments for nuclear physics, astrophysics and nuclear data as well as for industrial applications.

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SLEGS的第一天实验：系统测量197Au和159Tb的（γ, 1n）截面，以解决现有的数据差异。

上海激光电子伽玛源（SLEGS），建在上海同步辐射设施，是世界上第一个多功能激光康普顿斜散射光束线。选取197Au（γ, 1n）和159Tb（γ, 1n）反应截面作为SLEGS的第一天实验。将SLEGS数据与利弗莫尔和萨克雷正电子湮灭飞行设备的数据以及NewSUBARU激光康普顿后向散射设备的数据进行了比较。我们的数据证明与Livermore和Saclay的结果不一致，而与NewSUBARU的数据一致。这也与新的理论预测相一致。新的测量结果为解决利弗莫尔和萨克雷在未来19个原子核的光子中子截面数据之间长期存在的差异奠定了基础。在SLEGS产生的伽马射线束等待核物理、天体物理和核数据以及工业应用的各种实验。

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

Science Bulletin MULTIDISCIPLINARY SCIENCES-

CiteScore

24.60

自引率

2.10%

发文量

8092

期刊介绍： Science Bulletin (Sci. Bull., formerly known as Chinese Science Bulletin) is a multidisciplinary academic journal supervised by the Chinese Academy of Sciences (CAS) and co-sponsored by the CAS and the National Natural Science Foundation of China (NSFC). Sci. Bull. is a semi-monthly international journal publishing high-caliber peer-reviewed research on a broad range of natural sciences and high-tech fields on the basis of its originality, scientific significance and whether it is of general interest. In addition, we are committed to serving the scientific community with immediate, authoritative news and valuable insights into upcoming trends around the globe.