<p>Photonuclear data are increasingly used in fundamental nuclear research and technological applications. These data are generated using advanced <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41365_2025_1773_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>-ray sources. The Shanghai laser electron gamma source (SLEGS) is a new laser Compton scattering <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41365_2025_1773_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>-ray source at the Shanghai Synchrotron Radiation Facility. It delivers energy-tunable, quasi-monoenergetic gamma beams for high-precision photonuclear measurements. This paper presents the flat-efficiency detector (FED) array at SLEGS and its application in photoneutron cross-section measurements. Systematic uncertainties of the FED array were determined to be 3.02% through calibration with a <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41365_2025_1773_Article_IEq3.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">$^{252}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>252</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Cf neutron source. Using <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41365_2025_1773_Article_IEq4.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">$^{197}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>197</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Au and <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41365_2025_1773_Article_IEq5.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">$^{159}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>159</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Tb as representative nuclei, we demonstrate the format and processing methodology for raw photoneutron data. The results validate SLEGS’ capability for high-precision photoneutron measurements.</p>

Photoneutron cross-section data generation and analysis at the Shanghai laser electron gamma source

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发表日期：

2025年7月18日

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Zi-Rui Hao,
Long-Xiang Liu,
Yue Zhang,
Hong-Wei Wang,
Gong-Tao Fan,
Hang-Hua Xu,
Sheng Jin,
Yu-Xuan Yang,
Zhi-Cai Li,
Pu Jiao,
Kai-Jie Chen,
Qian-Kun Sun,
Zhen-Wei Wang,
Meng-Die Zhou,
Shan Ye,
Meng-Ke Xu,
Xiang-Fei Wang,
Yu-Long Shen

摘要

Photonuclear data are increasingly used in fundamental nuclear research and technological applications. These data are generated using advanced $\gamma$ $γ$ -ray sources. The Shanghai laser electron gamma source (SLEGS) is a new laser Compton scattering $\gamma$ $γ$ -ray source at the Shanghai Synchrotron Radiation Facility. It delivers energy-tunable, quasi-monoenergetic gamma beams for high-precision photonuclear measurements. This paper presents the flat-efficiency detector (FED) array at SLEGS and its application in photoneutron cross-section measurements. Systematic uncertainties of the FED array were determined to be 3.02% through calibration with a $^{252}$ $^{252}$ Cf neutron source. Using $^{197}$ $^{197}$ Au and $^{159}$ $^{159}$ Tb as representative nuclei, we demonstrate the format and processing methodology for raw photoneutron data. The results validate SLEGS’ capability for high-precision photoneutron measurements.