分类： 物理学 >> 核物理学 提交时间： 2025-07-09
Jiao, Dr. Pu
Hao, Dr. Zirui
Li, Dr. Zhicai
Sun, Dr. Qiankun
Liu, Dr. Longxiang
Xu, Dr. Hanghua
Zhang, Dr. Yue
Zhou, Miss Mengdie
Yang, Dr. Yuxuan
Jin, Dr. Sheng
Chen, Dr. Kaijie
Ye, Mr. Shan
Wang, Dr. Zhenwei
Wang, Dr. Yuting
Wei, Mrs. Hui-Ling
Fu, Dr. Yao
Wang, Prof. Hongwei
Fan, Prof. GongTao
Ma, Dr. Chun-Wang (Nuclear physics) 马春旺
摘要： To overcome the difficulty and expensive cost for some specific isotopic targets, a substitution method was proposed to measure the cross section of (γ, n) reactions. Considering that the natural copper element (natCu) only has 63Cu and 65Cu isotopes, the 65Cu(γ, n)64Cu reaction was taken as an example to test the substitution method. Using quasi-monoenergetic γ beams provided by the Shanghai Laser Electron Gamma Source (SLEGS) of the Shanghai Synchrotron Radiation Facility (SSRF), the natCu(γ, n) was measured from Eγ= 11.09 to 17.87 MeV. Furthermore, based on the 63Cu(γ, n) reaction measured using the same experimental setup at SLEGS, the 65Cu(γ, n)64Cu was extracted using the substitution method. The abundance variation of natural copper, showing a significant influence in the cross section, is also investigated. The results were compared to the existing experimental data measured by bremsstrahlung and positron annihilation in-flight sources, and the TALYS 2.0 predictions. The γ strength function (γSF) of 65Cu is obtained from the 65Cu(γ, n) data, and the reaction cross section of 64Cu(n, γ) was further calculated.
分类： 物理学 >> 核物理学 提交时间： 2025-04-15
Jiao, Dr. Pu
Hao, Dr. Zirui
Li, Dr. Zhicai
Sun, Dr. Qiankun
Liu, Dr. Longxiang
Xu, Dr. Hanghua
Zhang, Dr. Yue
Zhou, Miss Mengdie
Yang, Dr. Yuxuan
Jin, Dr. Sheng
Chen, Dr. Kaijie
Ye, Mr. Shan
Wang, Dr. Zhenwei
Wang, Dr. Yuting
Wei, Mrs. Hui-Ling
Fu, Dr. Yao
Wang, Prof. Hongwei
Fan, Prof. GongTao
Ma, Dr. Chun-Wang (Nuclear physics) 马春旺
摘要： To overcome the difffculty and expensive cost for some speciffc isotopic targets, a substitution method was proposed to measure the cross section of (γ, n) reactions. Considering that the natural copper element (natCu) only has 63Cu and 65Cu isotopes, the 65Cu(γ,n)64Cu reaction was taken as an example to test the substitution method. Using quasi-monoenergetic γ beams provided by the Shanghai Laser Electron Gamma Source (SLEGS) of the Shanghai Synchrotron Radiation Facility (SSRF), the natCu(γ, n) was measured from Eγ = 11.09 to 17.87 MeV. Furthermore, based on the previously measured 63Cu(γ, n) reaction using the same experimental setup at SLEGS, the 65Cu(γ, n)64Cu was extracted using the substitution method, which was compared to the existing experimental data measured by bremsstrahlung and positron annihilation in-ffight light sources, and the Talys2.0 toolkit predictions. The γ strength function (γSF) of 65Cu is obtained from the 65Cu(γ, n) data, and the reaction cross section of 64Cu(n, γ) was further calculated.
分类： 物理学 >> 核物理学 提交时间： 2025-01-27
Li, Dr. Xinxiang
Liu, Dr. Longxiang
Jiang, Dr. Wei
Chen, Miss YaJv
Ren, Dr. Jie
Wang, Prof. Hongwei
Fan, Prof. Gongtao
Luo, Dr. Wen
Feng, Dr. Song
XIe, Mr. Wen
Lin, Mr. ZiAn
Jiang, Miss Ting
Yang, Mr. GaoLe
An, Dr. ZhenDong
Li, Dr. Xankai
Liao, Mr. ZhouJi
Xue, Ms. Jieming
Li, Miss XinYu
Peng, Miss NingXin
Wang, Mr. Dexin
摘要： \ce{^{147,149}Sm} are slow neutron capture (s-process) nuclides in nuclear astrophysics, whose ($n,\gamma$) cross-section are the important input parameters in nucleosynthesis net calculation in the Samarium (Sm) region. Additionally, \ce{^{149}Sm} is a fission product of \ce{^{235}U} with 1\% yield, and its neutron resonance parameters play a critical role in reactor neutronics. According to the available nuclear evaluation databases, significant disagreement have been observed in the resonance peaks of \ce{^{147,149}Sm} (n,$\gamma$) cross section data within the energy range of 20-300 eV. In this study, the neutron capture cross section of the natural Samarium target was measured at the back-streaming white neutron beamline of China Spallation Neutron Source. The neutron capture yield was obtained and the neutron resonance parameters for \ce{^{147}Sm} at 107.0， 139.4， 241.7， and 257.3 eV and \ce{^{149}Sm} at 23.2, 24.6, 26.1, 28.0, 51.5, 75.2, 90.9, 125.3, and 248.4 eV were extracted using the SAMMY code based on R-matrix theory. For the parameters $\Gamma_n$ and $\Gamma_\gamma$ in these energies of \ce{^{147,149}Sm}, the percentages consistent with the results of the CENDL-3.2, ENDF/B-VIII.0, JEFF-3.3, JENDL-4.0, and BROND-3.1 database are 27\%, 65\%, 65\%, 42\%, and 58\%, respectively. Meanwhile, 27\% of the results were inconsistent with them included in any of the major libraries. This work enrichis the experimental data of \ce{^{147,149}Sm} neutron capture resonance and helps to clarify the differences between different evaluation databases at the above energies.
分类： 物理学 >> 核物理学 提交时间： 2024-12-17
Jiao, Dr. Pu
Hao, Dr. Zi Rui
Sun, Dr. Qiankun
Liu, Dr. Longxiang Xiang
Xu, Dr. Hanghua
Zhang, Dr. Yue
Zhou, Miss Mengdie
Li, Dr. Zhicai
Yang, Dr. Yuxuan
Jin, Dr. Sheng
Chen, Dr. Kaijie
Ye, Mr. Shan
Wang, Dr. Zhenwei
Wang, Dr. Yuting
Wei, Mrs. Hui-Ling
Fu, Dr. Yao
Wang, Prof. Hongwei
Fan, Prof. GongTao
Ma, Dr. Chun-Wang (Nuclear physics) 马春旺
摘要： Accurate Photoneutron cross section measurement of 27Al nuclei has an important impact on clarifying the differences in existing experimental data and improving the accuracy of the nuclear reaction rate calculation of 26Al in nuclear astrophysics. The photoneutron cross sections for the 27Al(γ, n) reaction, within the neutron separation energy 13.2 MeV to 21.7 MeV, has been meticulously measured employing a new Flat Efficiency Detector (FED) array at the Shanghai Laser Electron Gamma Source (SLEGS).
分类： 物理学 >> 核物理学 提交时间： 2024-12-06
Jiao, Dr. Pu
Hao, Dr. Zi Rui
Sun, Dr. Qiankun
Liu, Dr. Longxiang Xiang
Xu, Dr. Hanghua
Zhang, Dr. Yue
Zhou, Miss Mengdie
Li, Dr. Zhicai
Yang, Dr. Yuxuan
Jin, Dr. Sheng
Chen, Dr. Kaijie
Ye, Mr. Shan
Wang, Dr. Zhenwei
Wang, Dr. Yuting
Wei, Mrs. Hui-Ling
Fu, Dr. Yao
Wang, Prof. Hongwei
Fan, Prof. GongTao
Ma, Dr. Chun-Wang (Nuclear physics) 马春旺
摘要： Accurate Photoneutron cross section measurement of 27Al nuclei has an important impact on clarifying the differences in existing experimental data and improving the accuracy of the nuclear reaction rate calculation of 26Al in nuclear astrophysics. The photoneutron cross sections for the 27Al(γ, n) reaction, within the neutron separation energy 13.2 MeV to 21.7 MeV, has been meticulously measured employing a new Flat Efficiency Detector (FED) array at the Shanghai Laser Electron Gamma Source (SLEGS).
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